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.
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