Organisms and Populations Question 61
61. Which of the following is not true for a species?
[2005]
(a) Members of a species can interbreed.
(b) Gene flow does not occur between the populations of a species.
(c) Each species is reproductively isolated from every other species.
(d) Variations occur among members of a species.
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Answer : b
Hints & Solutions
(b) Gene flow is the spread of genes through populations as effected by movements of individual and their propagules, e.g. seeds spores etc. Gene flow ensures that all populations of a given species share a common gene pool. i.e. it reduces difference between populations. The interruption of gene flow between populations is a pre-requisite for the formation of new species.
