Question

Which of the following is not true for a species?

• A. Members of a species can interbreed
• B. Variations occur among members of a species
• C. Gene flow does not occur between the populations of a species
• D. Each species is reproductively isolated from every other species

Answer 1

The correct option is C Gene flow does not occur between the populations of a species

Species is the lowest taxon in the taxonomical hierarchy. The members of a particular species can interbreed, but are reproductively isolated from members of other species. Variations too, exist between members of a particular species. Gene flow is the "transfer" of genes from one population to another. This does happen between populations of a species, and tends to reduce the differences between populations. This is because gene flow ensures that all the populations of a particular species share a common gene pool.