Practice Test

Q1) Which one is the common point in Lamarckism and Darwinism? Show Answer

Q2) Genetic drift is on account of: Show Answer

Q3) Reproductive isolation between segments of a single population is termed: Show Answer

Q4) The present Giraffe has a long neck as compared to its ancestors. According to present day view could be due to: Show Answer

Q5) Appearance of ancestral characters in the new borns, such as tail, multiple mammae etc. are known as: Show Answer

Q6) Now-a-days Lamarckian theory is being reviewed in the light of modern concept of evolution under the heading Neo-Lamarckism. Who proved that the genes are influenced by the physical and chemical factors, so that they bring remarkable changes to the offsprings: Show Answer

Q7) According to the Neo-Lamarckism: Show Answer

Q8) One of the following is most essential of evolution: Show Answer

Q9) Changes in genetic characters on accumulation, leading to formation of new individuals is characteristics of: Show Answer

Q10) Radiations with successful adaptations in case of insects over a major period is a result of: Show Answer

Q11) The term used for similarity in organ structure seen in great diversity is: Show Answer

Q12) Darwinism fails to explain: Show Answer

Q13) Fishes to mammals have a similar structure with respect to: Show Answer

Q14) Balancing selection promotes: Show Answer

Q15) Cladogenesis refers to: Show Answer

Q16) Allopatric speciation is due to: Show Answer

Q17) The most complex cellular structures are found in: Show Answer

Q18) The oldest fossil of a mammal is from the: Show Answer

Q19) Successful adaptation simply means: Show Answer

Q20) The unit of evolution is now known to be the: Show Answer

Q21) The unit of natural selection is the: Show Answer

Q22) Total collection of genes at any one time in a unit of evolution is called the: Show Answer

Q23) A change in the relative abundance of an allele (the allelic frequency) within a population, over a succession of generations is called: Show Answer

Q24) Micro-evolution can be measured by comparing observed allelic frequencies with those predicted by: Show Answer

Q25) A potential danger to a population that has been greatly reduced in number is the: Show Answer

Q26) All alleles originate from: Show Answer

Q27) A beneficial allele increases more rapidly in frequency if it is: Show Answer

Q28) Sympatric speciation occurs most commonly in: Show Answer

Q29) Reproductive isolation in a sympatric speciation develops without a: Show Answer

Q30) Darwin found that South American fossils are most similar to: Show Answer

Q31) According to Darwin, two different areas within a continent have different species because they have different: Show Answer

Q32) Population of Biston betularia change from 1% dark 99% light individuals, 99% dark and 1% light individuals between 1848 to 1898. The selective agent causing the change was: Show Answer

Q33) The most important evidence since Darwin bears on his theory has been the area of: Show Answer

Q34) Phylogeny describes a species: Show Answer

Q35) Plants and animals of the Galapagos Islands resemble most closely the plants and animals of: Show Answer

Q36) Similar traits resulting from similar selection pressures acting on similar gene pools is: Show Answer

Q37) The process of evolution: Show Answer

Q38) Evolution is generally: Show Answer

Q39) Evolution means: Show Answer

Q40) Charles Darwin toured in a ship for 5 years. It was: Show Answer

Q41) The modern theory of organic evolution is based on: Show Answer

Q42) Genetic variation arises by: Show Answer

Q43) Genes mutate by: Show Answer

Q44) Natural selection really means: Show Answer

Q45) Saltations is the name given to: Show Answer

Q46) Role of isolation in evolution is: Show Answer

Q47) Which is the most important factor for the development of a new species? Show Answer

Q48) There is more competition for survival between: Show Answer

Q49) Speciation depends on the sum total of adaptive changes preserved by: Show Answer

Q50) Separation of a variant population from the original population by a mountain is called: Show Answer

Q51) The propounder of theory of Natural Selection was: Show Answer

Q52) The doctrine of evolution is particularly concerned with: Show Answer

Q53) The theory of inheritance of acquired characters was proposed by: Show Answer

Q54) Organic evolution refers to: Show Answer

Q55) Retrogressive evolution refers to: Show Answer

Q56) The various concepts such as conflict, struggle and survival were first introduced by: Show Answer

Q57) De vries worked on the plant: Show Answer

Q58) Mechanical isolation in plants is illustrated with an example of: Show Answer

Q59) Speciation in two adjacent populations refers to: Show Answer

Q60) Which of the following is not a part of Lamarck theory of evolution? Show Answer

Q61) Who wrote the famous book "Philosophie Zoologique." Show Answer

Q62) According to Darwin, the different populations of the same species are referred to as: Show Answer

Q63) Acquired characters are inherited. Who of the following scientist did not support the idea? Show Answer

Q64) Staunch supporter of Neo-Lamarckism is: Show Answer

Q65) Drawin theory of natural selection: Show Answer

Q66) The concept of evolution through natural selection remains incomplete without: Show Answer

Q67) Who performed famous inbreeding experiments to expose inefficiency of Darwinism? Show Answer

Q68) Adaptive radiation is: Show Answer

Q69) Two different groups evolve in such a way so as to produce similar traits. This is an example of: Show Answer

Q70) Marine arthropods were preadapted to terrestrial life by having: Show Answer

Q71) "An organ is used well, it will develop better and if it is not used, it is likely to become vestigial". This was given by: Show Answer

Q72) Blood precipitation tests are useful in: Show Answer

Q73) A scientist kept 72 generations of Drosophila in darkness, even after that the first flies had normal eyes. This disapproves the law of: Show Answer

Q74) The struggle for existence is a consequence of: Show Answer

Q75) When in nucleus of some animal cell the number of chromosomes is increased or decreased, and a change takes place in the genes, then the event is called: Show Answer

Q76) In convergent evolution: Show Answer

Q77) The aspect most profoundly coupled with natural selection is: Show Answer

Q78) The modern scientific theory is redefined: Show Answer

Q79) Microevolution concerns occurrence of: Show Answer

Q80) Distantly related organisms with similar traits have experienced: Show Answer

Q81) "Drawin theory of Natural Selection" was objected to, because it: Show Answer

Q82) Parallelism is: Show Answer

Q83) The Hardy-Weinberg Law states that when two alleles are considered: Show Answer

Q84) The Hardy-Weinberg Law allows us to predict that: Show Answer

Q85) The change of lighter coloured variety of peppered moth, Biston betularia to its darker variety (carbonaria) is due to: Show Answer

Q86) In evolution, change mutation occurs in: Show Answer

Q87) Genetic drift is most important in which situation? Show Answer

Q88) Genetic drift is more likely to cause evolution in a small population because: Show Answer

Q89) Selection will not eliminate a lethal recessive allele from a large population of diploid organisms because: Show Answer

Q90) Main locus of Darwin's theory is: Show Answer

Q91) The theory of Neo-Lamarckism is dependent on: Show Answer

Q92) A rapidly growing population experiences increasing genetic variability because: Show Answer

Q93) When food is distributed in such a way that an animal must spend a large part of its day wandering from one place to another to find enough to eat, what type of mating system would you expect it to have? Show Answer

Q94) A human male who remains a bachelor is most likely to enhance his evolutionary success by altruistic behaviour towards the children of: Show Answer

Q95) In light of the definition of evolution, which of the following is not capable of evolving? Show Answer

Q96) Which of the following did Kettlewell conclude from his studies on industrial melansim in moths? Show Answer

Q97) Which bird is most evolutionarily successful? Show Answer

Q98) Suppose that you have a pack of 50 assorted dogs. You select the largest male and the largest female from the group, mate them, and sterilize the other members of the pack. Assuming that food supplies remain adequate, you should expect that, in the next generation of dogs: Show Answer

Q99) What is petrification? Show Answer

Q100) The main dictate / s of Lamarck's theory is / are: Show Answer

Q101) For evolutionary success, a mutation occurs in: Show Answer

Q102) The idea of natural selection as the fundamental process of evolutionary change was reached by: Show Answer

Q103) Darwin was influenced by one of the following in proposing the theory of his natural selection: Show Answer

Q104) Natural selection acts on an organism: Show Answer

Q105) Micro-evolution changes: Show Answer

Q106) Industrial melanism is an example of: Show Answer

Q107) Role of mutation in evolution is: Show Answer

Q108) One of the following is obtained by artificial selection: Show Answer

Q109) The frequency of a mutant gene in a population is expected to increase if the gene is: Show Answer

Q110) The term isolating mechanism was coined by: Show Answer

Q111) Who is known as father of evolution? Show Answer

Q112) The evolution resulting in the formation of new species is known as: Show Answer

Q113) Macroevolution operates above species level and results in the establishment of: Show Answer

Q114) In speciation which of the following is most important: Show Answer

Q115) Drawin's finches are: Show Answer

Q116) Which of the following statement is false? Show Answer

Q117) Two accessory processes which contribute towards the occurrence of evolution are: Show Answer

Q118) ______ was the first person who considered the real meaning of fossils: Show Answer

Q119) Which of the following is a matching set? Show Answer

Q120) Class Reptilia first appears in the fossils records in: Show Answer

Q121) The initial appearance of reptiles from amphibian ancestors to completely terrestrial habitat is an example of: Show Answer

Q122) The complete evolution of horse has taken about: Show Answer

Q123) What is the essence of evolution? Show Answer

Q124) In the course of evolution: Show Answer

Q125) The concealing type of protective mimicry is associated with: Show Answer

Q126) Phyllopteryx equus (Australian sea horse) shows: Show Answer

Q127) Natural selection that favours heterozygotes is called: Show Answer

Q128) The type of selection that tends increase the amount of variance within populations is termed: Show Answer

Q129) Condensation of the phylogenetic events and the elimination of others in the embryonic development is referred to as: Show Answer

Q130) Theory of natural selection of Darwin was based on: Show Answer

Q131) Persons who do hard manual work with their hands are likely to develop: Show Answer

Q132) Modern synthetic theory of evolution is based on: Show Answer

Q133) What is of importance for a species to survive in a changing environment: Show Answer

Q134) Being all mammals whale, dolphin, bat, monkey show important common characters but they also show conspicuous differences. This is due to the phenomenon of: Show Answer

Q135) Darwin's theory gets much recognition because: Show Answer

Q136) Birds and mammals in geological development of earth arose in period: Show Answer

Q137) "Evolution can be regarded as the effect of natural selection on the continuous appearance of mutant forms." What reason would you gave to it? Show Answer

Q138) Experimental evidence for selection bacteria by using the replica technique was demonstrated by: Show Answer

Q139) Regarding evolution, Drawin's explanation is that: Show Answer

Q140) Which of the following is not inheritable? Show Answer

Q141) Organic evolution would not have taken place if: Show Answer

Q142) Under which of the following conditions organic evolution could not have taken place: Show Answer

Q143) Lederberg's replica plating experiment suggest: Show Answer

Q144) Which phenomenon of evolution was best explained by Darwin? Show Answer

Q145) A good example of mechanical isolation in plants is of: Show Answer

Q146) Formation of high milk-yielding cows is example of: Show Answer

Q147) According to Goldschmidt's classification, evolution of subspecies or geographic races is known as: Show Answer

Q148) Genetic drift: Show Answer

Q149) Who considered that gene is the vehicle of inheritance and discontinuous variations could be inherited through genes? Show Answer

Q150) Who proposed the concept of intraspecific and interspecific struggle? Show Answer

Q151) Which one of the following is the best example of an evolutionary change in a speices of an organism? Show Answer

Q152) Darwinism is based on: Show Answer

Q153) The convergent evolution of two species is usually associated with: Show Answer

Q154) A detailed classification of isolating mechanisms was provided by: Show Answer

Q155) The isolation caused due to differences in the habit of organisms such as food and physiological requirements is called: Show Answer

Q156) A post-mating isolating mechanism in which the development of hybrid zygote is often irregular and may end at any stage between fertilization and adulthood, is known as: Show Answer

Q157) _________ isolation refers to the barriers to mating among the individuals of different species in their courtship behaviour: Show Answer

Q158) Mutation, natural selection, genetic drift and emigration are considered to be essential factors of evolution. The statement that best explains genetic drift is: Show Answer

Q159) Neo-Darwinism do not appreciate the role in evolution of: Show Answer

Q160) Which of the following statement is false? Show Answer

Q161) The barriers which check the free exchange of genes between populations (subspecies) are called: Show Answer

Q162) Galapagos islands in Pacific ocean on the west coast of South America is a chain of: Show Answer

Q163) In addition to the other books, Darwin also wrote: Show Answer

Q164) One of the following plants is tolerant to selenium: Show Answer

Q165) When a hybrid produces sterile or infertile offspring, it is known as: Show Answer

Q166) Distribution of land snails in Hawaiians island affords an example of: Show Answer

Q167) Which of the following is a post-mating isloating mechanism? Show Answer

Q168) Point out the pre-mating isolating mechanism from the following: Show Answer

Q169) Penguins occur at south pole while north pole has polar bears and not penguins. Why? Show Answer

Q170) Chinese women used to keep their feet enclosed in iron shoes for many years so that their feet remain small in size. Is this character passed on to the next generation? Show Answer

Q171) Penguin is a bird that lost the use of its wings by not flying. Such statement would express the views of: Show Answer

Q172) An Indian and a Japanese though differing in physical features resemble each other precisely at the level of: Show Answer

Q173) The mule is a hybrid of: Show Answer

Q174) The hybrid zygotes produced in fishes fail to cleave and develop properly. It is due to: Show Answer

Q175) Who wrote essay on Population? Show Answer

Q176) Lederberg and Lederberg are famous for their work on: Show Answer

Q177) Genetic drift is shown by: Show Answer

Q178) Maximum endemism occurs in: Show Answer

Q179) New species develops in a spatially isolated population. It is an example of: Show Answer

Q180) Formation of new species due to sudden genetic isolation is: Show Answer

Q181) Bio-indicator of underground water is: Show Answer

Q182) What is a species found in different geographical areas known as? Show Answer

Q183) Carnivores developed retractile claws for: Show Answer

Q184) Payne (1911) kept Drosophila in dark for a number of generations: Show Answer

Q185) Harrison developed melanic moth variety by: Show Answer

Q186) Genetic drift, or changes in allelic frequency due to chance factors, occurs in populations that are very: Show Answer

Q187) A plant population that reproduces by self-pollination is an extreme example of: Show Answer

Q188) Natural selection is best defined as occuring when the environment causes: Show Answer

Q189) Microevolution can be measured by comparing observed allelic frequencies with those predicted by: Show Answer

Q190) Diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos Islands, as observed by Darwin, provides evidence for: Show Answer

Q191) Species occurring in different geographical areas are called as: Show Answer

Q192) An interesting modification of flower shape for insect pollination occurs in some orchids in which a male insect mistakes the pattern on the orchid flower for the female of his species and tries to copulate with it, thereby pollinating the flower. This phenomenon is called: Show Answer

Q193) Genetic drift operates only in: Show Answer

Q194) What is the most important factor for the success of animal population? Show Answer

Q195) Correct statement about failure of hybrid formation is: Show Answer

Q196) Which of the following is not explained by Lamarckism: Show Answer

Q197) Lamarckian theory deals with: Show Answer

Q198) DDT is not effective on mosquitoes because: Show Answer

Q199) de Vries theory of mutation is: Show Answer

Q200) Organic evolution means: Show Answer

Q201) Following was contribution of Herbert Spencer: Show Answer

Q202) Neo-Darwinism is based on: Show Answer

Q203) Mammals and birds arose from reptiles during which period: Show Answer

Q204) Neo-Darwinism deals with: Show Answer

Q205) Drawin's theory is mainly based on: Show Answer

Q206) The basis of Neo-Lamarckism is: Show Answer

Q207) Which is related to reproductive isolation? Show Answer

Q208) Theory of pangenesis was given by: Show Answer

Q209) Phenomenon of industrial melanism demonstrates: Show Answer

Q210) Darwin wrote "Origin of Species" in: Show Answer

Q211) The animal that explains industrial melanism is: Show Answer

Q212) Lederberg's replica experiment explains: Show Answer

Q213) Gene pool of a population tends to remain stable if the population is large, without large scale mutations, without migration and with: Show Answer

Q214) Naturalist who sailed round the world in ship Beagle was: Show Answer

Q215) The theory that environment can bring about changes in individuals was proposed by: Show Answer

Q216) Darwin's theory states that: Show Answer

Q217) The pioneers in the field of 'Organic evolution' are: Show Answer

Q218) Fore-coming generations are less adaptive than these parental generations due to: Show Answer

Q219) Darwin's theory of pangenesis shows similarity with theory of inheritance of acquired characters, then what shall be correct according to it? Show Answer

Q220) Frequency of a allele in a isolated population may change due to: Show Answer

Q221) In Lederberg's replica plating experiment what shall be first used to obtain streptomycin resistant bacteria strain? Show Answer

Q222) Industrial melanism is an example of: Show Answer

Q223) Which one of the following describes correctly the homologous structure? Show Answer

Q224) Darwin in his "Natural Selection Theory" did not believe in any role of which one of the following in organic evolution? Show Answer

Q225) Mule is a product of: Show Answer

Q226) According to modern synthetic theory of evolution, organic evolution depends upon: Show Answer

Q227) The most likely reason for the development of resistance against pesticides in insects damaging a crop is: Show Answer

Q228) Geographic and reproductive isolation bring about: Show Answer

Q229) The term species was coined by: Show Answer

Q230) Which of the following is called Sewall-Wright effect? Show Answer

Q231) de Vries gave his mutation theory on organic evolution while working on: Show Answer

Q232) Which of the following evidences does not favour the Lamarckian concept of inheritance of acquired characters? Show Answer

Q233) Survival of the fittest was given by: Show Answer

Q234) Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not orginate as adaptation. These imprints needs to be used: Show Answer

Q235) Hardy-Weinberg equilibrium is known to be affected by gene flow genetic drift, mutation, genetic recombination and: Show Answer

Q236) At a particular locus, frequency of "A" allele is 0.6 and that of a 'a' is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium? Show Answer

Q237) In random mating population in equilibrium, which of the following brings about a change in gene frequency in a non directional manner? Show Answer

Q238) The biogenetic law of Haeckel is: Show Answer

Q239) Which of the following statement is correct? Show Answer

Q240) The objections to Darwin's theory of natrual selection is / are: Show Answer

Q241) Evolutionary history of an organism is known as: Show Answer

Q242) Which of the following disproved experimentally the concept of inheritance of acquired characters? Show Answer

Q243) The Hardy-Weinberg law of equilibrium was based on the following: Show Answer

Q244) Peppered moth (Biston betularia) is an example of: Show Answer

Q245) Darwin's finches are a good example of: Show Answer

Q246) Micro-evolution can be best defined as the evolution: Show Answer

Q247) In India, human population is heavily weighed towards the younger age group as a result of: Show Answer

Q248) Industrial melanism as observed in pepered moth proves that: Show Answer

Q249) A high density of elephant population in an area can result in: Show Answer

Q250) Select the correct statement from the following: Show Answer

Q251) One of the important consequences of geographical isolation is: Show Answer

Q252) Which one of the following scientist's name is correctly matched with the theory put forth by him: Show Answer

Q253) The essence of Darwinian theory about evolution is: Show Answer

Q254) Darwin theory of natural selection was influenced by work of: Show Answer

Q255) Natural selection is based on certain observations which are factual. They are: Show Answer

Q256) Key concepts of Darwinian theory are: Show Answer

Q257) The process of evolution of different species in a given geographical area starting from a point and spreading to other areas is called: Show Answer

Q258) Huge clusters of galaxies comprise the universe. This universe is how many years old? Show Answer

Q259) Big Bang theory explain the origin of universe. Life appeared on earth about how many years ago? Show Answer

Q260) Hardy-Weinberg equilibrium is affected by: Show Answer

Q261) Dinosaurs became extinct during which period: Show Answer

Q262) The Neanderthal man with a brain seize of 1400 cc lived near East and Central Asia between: Show Answer

Q263) The biggest dinosaurs about 20 ft in height was: Show Answer

Q264) Which of the following is correct? Show Answer

Q265) Lumpers tend to: Show Answer

Q266) Reproductive isolation in sympatric speciation develops without a: Show Answer

Q267) Which of the following is most rapid method of speciation is? Show Answer

Q268) Common bread wheat is thought to have arisen through: Show Answer

Q269) One of he following phenomena supports Darwin's concept of natural selection in organic evolutions. It is: Show Answer

Q270) Natural Selection -
A. Tends to increase the characters that enhance survival and reproduction.
B. Causes adaptation.
C. Acts on an organisms phenotype.
D. Was considered as mechanism of evolution by Darwin. Show Answer

Q271) Which one(s) is/are correct? Show Answer

Q272) A. Fossils are remains of hard parts of life forms in Rock.
B. A study of fossils in different sedimentary layers indicates the geological period in which they live.
C. Radio isotopes are often used to determine the age of the fossils.
D. Study of fossils is called palaenotology. Show Answer

Q273) Which one(s) is/are correct? Show Answer

Q274) Darwinian Variations are Show Answer

Q275) Select the correct statement(s).
A. The essence of Darwinian theory about evolution is natural selection.
B. The rate of appearance of new forms is not linked to the life cycle or the life span.
C. Adaptative ability is not inherited.
D. Mutation is random and directionless. Show Answer

Q276) A. Adaptive ability is inherited.
B. Adaptive ability has a genetic basis.
C. Fitness is the end result of the ability to adapt and get selected by nature. Show Answer

Q277) Evolution -
A. Is descent with modification.
B. Is gradual for Darwin.
C. Is a change, in the frequency of an allele within a population, caused by differential reproduction in response to local environmental conditions.
D. Is irreversible. Show Answer

Q278) Which of the following are necessary for evolution by natural selection to take place?
I. Offsprings resemble their parents more than other individuals in the population.
II. Differences among individuals exist and lead to different numbers of successful offspring being produced.
III. Individuals adjust their development depending on the environment.
IV. Every individual has a desire to have many offsprings.
V. Populations tend to grow faster than their food supplies. Show Answer

Q279) Which one(s) is/are correct?
A. Thomas Malthus is well known for his book on populations.
B. The work of Thomas Malthus on population did not influence Darwin.
C. There must be a genetic basis for getting selected and to evolve.
D. All the finches on the Galapagos islands are descended from a common ancestor. Show Answer

Q280) All are true regarding the genetic drift except Show Answer

Q281) Select the correct statement(s). Show Answer

Q282) A. Amphibians evolved into reptiles.
B. Fish with stout and strong fins could move on land and go back to water. This was about 350 mya.
C. About 65 mya (in cretaceous period) the dinosaurs suddenly disappeared from the earth.
D. Archeopteryx is the connecting link between birds and reptiles. Show Answer

Q283) First organisms that invaded land were Show Answer

Q284) Psilophyton gave the origin to -
A. Horse tails.
B. Ferns.
C. Ginkgos.
D. Conifers. Show Answer

Q285) The first vascular plants were represented by an extinct group Show Answer

Q286) Zosterophyllum gave the origin to Show Answer

Q287) Select the correct statement(s) -
A. Microbial experiment shows the pre-existing advatangous mutations when selected will result in the observation of new phenotypes. Over few generation this would result in speciation.
B. Neanderthal fossils represent a human relative.
C. In 1938, a fish caught in South Africa happened to be a coelacanth (lobe fins) which was thought to be extinct. These animals evolved into the first amphibian living on both land and water.
D. Lichens can be used as water pollution indicators.
E. Alfred Wallace, a naturalist, who worked in Malay Archipelago (present Indonesia) has also come to similar conclusion on natural selection as reached by Darwinism. Show Answer

Q288) Existence of coal/petroleum can be known from the study of Show Answer

Q289) The origin of angiosperms took place during Show Answer

Q290) Tasmanian wolf is a marsupial while wolf is a placental mammal. This shows Show Answer

Q291) Adaptive radiation refers to Show Answer

Q292) Home erectus -
A. had a large brain around 900 c.c.
B. probably ate meat.
C. appeared about 1.5 mya year ago.
D. evolved from H. habilis. Show Answer

Q293) Which of the following is/are incorrect about Neanderthal man?
A. has large brain around 900 c.c.
B. lived in near east and central Asia between 100000 - 40000 years back.
C. used hides to protect their body and buried their dead.
D. has no religious feeling. Show Answer

Q294) Which one(s) is/are correct of Australopithecus?
A. They lived in East African grassland.
B. They hunted with stone weapons.
C. They essentially ate fruits.
D. They were transitional stages between the apes and humans. Show Answer

Q295) Which is the correct chronological sequence of human evolution Show Answer

Q296) Which is the correct option of evolutionary history from reptiles to Dinosaurs Show Answer

Q297) The sequence of origin of life may be Show Answer

Q298) In the Hardy-Weinberg's equation the homozygous dominant individuals in a population are represented by Show Answer

Q299) Given below are two statements each with one or more blanks. Select the option which correctly fills up the blanks in the statements.
Statements :
In a mixed population, those that can better-adapt, ___(i)___ and increase in population size. No variant is ____(ii)____ wiped out.
Similarly, excess use of herbicides, pesticides, etc., has only resulted in selection of resistant varieties in a much ____(iii)____ time scale. This is also true for microbes against which we employ antibiotics or drugs against eukaryotic organisms/cell. Hence, resistant organisms/cells are appearing in a time scale of months or years and not centuries.
These are examples of evolution by ____(iv)____ action. This also tells us that evolution is not a ____(v)_____ process in the sense of determinism. It is a ____(iv)____ process based on chance events in nature and chance _____(vii)_____ in the organisms. Show Answer

Q300) Which of the following statements is true about Charles Darwin? Show Answer

Q301) Charles Darwin concluded that the 13 species of finches on the Galapagos Islands Show Answer

Q302) The sequence of events in geographic speciation is most likely to be Show Answer

Q303) Which of the following is correct? Show Answer

Q304) The following are some major events in the early history of life -
P. first heterotrophic prokaryotes.
Q. first genes.
R. first eukaryotes.
S. first autotrophic prokaryotes.
T. first animals.
Which answer below places these events in the correct order? Show Answer

Q305) Three form of the peppered moth, Biston betularia, namely the melanic form, the pale form, and a form intermediate between those two, are found in Britain today. The melanic form was first observed in 1848 and its frequency subsequently increased. This is thought to be the result of Show Answer

Q306) An inter-breeding population of finches became separated geographically, forming two isolated groups. Each group then became subject to different selective pressures. One group was then introduced into the habitat of the other.
Which one of the following would determine whether they now formed two distinct species? Show Answer

Q307) In which of the following situations would evolution be slowest for an inter-breeding population? Show Answer

Q308) Which of the following has evolved mainly as a result of artificial selection? Show Answer

Q309) An example of process of evolution of different species in a given geographical area starting from a common point and radiating to other areas of geography can be Show Answer

Q310) Genetic drift is a random change in allele frequencies. Sometimes, the change in allele frequencies is so different that the new sample of population becomes a different species. This is known as Show Answer

Q311) Which of the following are the examples of adaptive radiation?
A. Wombat, marsupial rat, Flying phalanger.
B. Darwin's finches.
C. Different placental mammals in Australia.
D. Placental wolf and Tasmanian wolf. Show Answer

Q312) The peppered moth Biston betularia with dull gray or white colour was abundant in England before industrial revolution. During post industrialization period, the tree trunks became dark due to smoke and soot and the black coloured variants of the moth became more abundant. The black color of the moths was due to Show Answer

Q313) Imagine a population of 100 snails in which shell colour is controlled by two alleles : B (black) and b (yellow) 20 of the snails are yellow (b/b) and 80 are black (B/B or B/b). Of the 80 black snails, 30 are homozygous and 50 are heterozygous.
A. How many of the loci for this gene are occupies by the B allele?
B. What is the allelic frequency of B?
C. Assuming sexual reproduction with random mating, no gene flow and no selection, what will be the frequency of yellow snails in the next generation of the population?
D. What is the total number of loci for the gene for shell colour in this population? Show Answer

Q314) Mendel described the frequency of ____I_____ for the offspring of a single ____II____; Hardy and Weinberg described the frequency of _____III______ for an entire ___IV___. Show Answer

Q315) Assume that allele C occurs at 60 percent of the loci and allele c at 40 percent of the loci for a particular gene in a population. Assuming Hardy-Weinberg equilibrium, the frequency of genotype C/C in the next generation will be ___I___ ; the frequency of genotype C/c will be ____II____; and the frequency of genotype c/c will be ___III____. Show Answer

Q316) An isolated population of humans, with approximately equal numbers of blue-eyed and brown-eyed individuals, was decimated an earthquake. Only a few brown-eyed people remained to form the next generation. This kind of change in the gene pool is called Show Answer

Q317) Genetic drift occurs when a few individuals of a species colonize an island. This particular phenomenon is known as Show Answer

Q318) A new mutation spreads from one population to another by means of Show Answer

Q319) If a new allele suddenly becomes very abundant in a population, most likely it is Show Answer

Q320) I. The loss or gain of alleles in a population due to emigration or immigration is known as _________; it decreases genetic differences among populations.
II. Nonrandom mating of individuals within a population is called _________ and can cause deviations from the Hardy-Weinberg prediction.
III. When the environment causes a change in the gene pool by controlling reproductive success according to genotype it is called_________. Show Answer

Q321) The Darwinian fitness can be estimated by Show Answer

Q322) Which of the following best characterizes an adaptive radiation? Show Answer

Q323) Which of the following ways is most likely to decrease the genetic diversity in a population? Show Answer

Q324) The concept that species have changed over long periods of time is known as Show Answer

Q325) What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors? Show Answer

Q326) Mark the correct statement Show Answer

Q327) What is true regarding industrialization in England Show Answer

Q328) The resistant varieties are being evolved in much lesser time than before. It is due to Show Answer

Q329) Read the following three statements (A to C) and mark the most appropriate option -
A. The fitness in the 'survival of the fittest' is based upon the characteristics that are inherited.
B. Darwin's variations were small and directional.
C. The fitness is the end result of ability to adapt. Show Answer

Q330) Which of the following factor does not affect Hardy-Weinberg's equilibrium Show Answer

Q331) In case of natural selection when more individuals acquire the peripheral character value at both ends of the distribution curve. The selection is called Show Answer

Q332) The two key concepts of Darwinian theory of evolution are Show Answer

Q333) Being the hominid, the first human like creature was called Show Answer

Q334) Mark the correct statement Show Answer

Q335) The most apparent change during the evolutionary history of Homo sapiens is traced in Show Answer

Q336) The concept that formed the basis of Lamarck's theory of evolution and later disproved experimentally was Show Answer

Q337) Which of the following statements are true for genetic drift?
I. It upsets the Hardy-Weinberg equilibrium.
II. It operates only in small population.
III. It is responsible for preserving certain genes.
IV. It is responsible for eliminating certain genes. Show Answer

Q338) Population genetics can provide insight into all of the following, except Show Answer

Q339) Darwin believed that a giraffe has a long neck because Show Answer

Q340) Both C. Darwin and A. R. Wallace developed, independently of each other, the theory of evolution by natural selection. Yet Darwin is given credit for the theory because he Show Answer

Q341) Australia has unusual organisms because their evolution for the past 38 million years has been Show Answer

Q342) Which of the following statements would Darwin most likely disagree? Show Answer

Q343) Among individuals, the ultimate source of heritable differences fueling natural selection is Show Answer

Q344) The classification of bacterial species does not fit the usual definition of species. This is because bacteria Show Answer

Q345) For Bateson mutation is discontinuous variation Evolution for Darwin was gradual while de Vries believed mutation caused species and hence called it Show Answer

Q346) The first vertebrates to colonize land were Show Answer

Q347) Ancient mammals enjoyed a release from competition when the dinosaurs became extinct. Should humans work to ensure that such releases from competition continue to occur for us or for other species? Show Answer

Q348) Early mammals were Show Answer

Q349) If the Neanderthals are not the direct ancestors of humans, is it still possible for humans and Neanderthals to be related? Show Answer

Q350) You are shown a skull from one of the Australopithecus species. How can you tell that is not from a modern human? Show Answer

Q351) Which word does not describe humans? Show Answer

Q352) An Australian mole is actually a marsupial rather than a placental mammal like the North American or European mole. The two animals are similar in appearance because Show Answer

Q353) Scientists believe that over millions of years, Australian mammals have become very different from other mammals as a direct result of Show Answer

Q354) The following list includes three Australian marsupial mammals and three placental mammals which occupy similar ecological niches in other continents of the world. 1. great red kangaroo 2. flying squirrel 3. sloth 4. phalanger 5. koala bear 6. deer.
Which of the following correctly pairs each marsupial with the equivalent placental? Show Answer

Q355) Biogenetic law as given be Haeckel states that Show Answer

Q356) The origin of mammals like reptiles occurred in Show Answer

Q357) Stanley Miller had put the Oparin-Haldane theory to test in 1953 by creating in the laboratory, the probable conditions of the primitive earth. In the experiment, simple amino acids were synthesized from which of the following mixtures as observed after 18 days? Show Answer

Q358) The biologist who has been called the "Darwin of the 20th century", was Show Answer

Q359) Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as Show Answer

Q360) Which one of the following options gives one correct example each of convergent evolution and divergent evolution? Show Answer

Q361) The extinct human who lived 1,00,000 to 40,000 years ago, in Europe, Asia and parts of Africa. With short stature, heavy eyebrows, retreating fore heads, large jaws with heavy teeth, stocky bodies, a lumbering gait and stooped posture was Show Answer

Q362) Which statement is best supported by fossil records? Show Answer

Q363) Which statement about the rates of evolution live on the same planet Show Answer

Q364) A large population of cockroaches was sprayed with a newly developed, fast-acting insecticide. The appearance of some cockroaches that are resistant to this insecticide supports the concept that Show Answer

Q365) Differences between the members of a population will most likely be passed to future generations if they are Show Answer

Q366) How does natural selection operate to cause change in a population? Show Answer

Q367) Many animals exist today in a form that is almost identical to the form they had a million years ago. What is the most probable explanation for this lack of evolutionary change? Show Answer

Q368) Which situation would most likely result in the highest rate of natural selection? Show Answer

Q369) Which statements best illustrates a rapid biological adaptation that has actually occurred? Show Answer

Q370) According to Darwin, the organic evolution is due to Show Answer

Q371) The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function. This is an example of Show Answer

Q372) Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as Show Answer

Q373) The process by which organisms with different evolutionary history evolve similar phenotypic adaptation in response to a common environmental challenge, is called Show Answer

Q374) The tendency of population to remain in genetic equilibrium may be disturbed by Show Answer

Q375) In a population consisting of 800 individuals of an insect species, there are only two alleles for the gene locus that determines eye color. One allele is dominant to the other. There are 250 homozygous dominant, 400 heterozygous and 150 homozygous recessive individuals. What is the approximate frequency of the recessive allele in the gene pool of this population? Show Answer

Q376) In a population of 1000 individuals 360 belong to genotype AA, 480 to Aa and the remaining 160 to aa. Based on this data, the frequency of allele A in the population is Show Answer

Q377) Forelimbs of cat, lizard used in walking; forelimbs of whale used in swimming and forelimbs of bats used in flying are an example of Show Answer

Q378) The neanderthals can be attributed with all of the following characteristics, except Show Answer

Q379) Which of the following is not an example of molecular evidence in favour of evolution? Show Answer

Q380) Choose the incorrect statement. Show Answer

Q381) The first human-like hominid was called Show Answer

Q382) Oparin and Haldane proposed Show Answer

Q383) Choose the wrong pair. Show Answer

Q384) In Miller's experiment, the following was not the part of starting chemicals Show Answer

Q385) Fossils act as evidences of organic evolution. Which one of these features does not justify the feature of fossils? Show Answer

Q386) Person suffering from sickle cell anaemia normally do not suffer from Show Answer

Q387) Which of the following had the smallest brain capacity? Show Answer

Q388) Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism? Show Answer

Q389) A population will not exist in Hardy-Weinberg equilibrium if Show Answer

Q390) The wings of a bird and the wings of an insect are Show Answer

Q391) In order for new species to develop, there must be a change in the Show Answer

Q392) The concept that new varieties of organisms are still evolving is best supported by the Show Answer

Q393) Two organisms are closely related and the thought to share a similar evolutionary history. If this assumption is correct, these organisms most likely have Show Answer

Q394) Which statement is not part of the concept of natural selection? Show Answer

Q395) Which factor could be the cause of the other three in an animal species? Show Answer

Q396) In a population of 5000 individuals, 450 individuals show a recessive trait. What will be number of heterozygous individual in this population? Show Answer

Q397) Which of the following structures is homologous to the wing of a bird? Show Answer

Q398) Following are the two statements regarding the origin of life -
(a). The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
(b). The first autotrophic organisms were the chemoautotrophs that never released oxygen. Of the above statements which one of the following options is correct? Show Answer

Q399) Analogous structures are a result of Show Answer

Q400) Genetic drift operates in Show Answer

Q401) In Hardy-Weinberg equation, the frequency of heterozygous individuals is represented by Show Answer

Q402) The chronological order of human evolution from early to the recent is Show Answer

Q403) Which one of the following is the correct sequence of events in the origin of life?
I. Formation of protobionts
II. Synthesis of organic monomers
III. Synthesis of organic polymers
IV. Formation of DNA-based genetic systems Show Answer

Q404) In terms of evolutionary origin, which one of the following is correct? Show Answer

Q405) Mechanism of organic evolution proposed by Hugo de Vries is based upon Show Answer