| 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) | Each species is reproductively isolated from every other species | d) | Gene flow does not occur between the populations of a species |
| (d)Gene flow means the spread of genes through population as affected by movements of individuals and their propagules, e.g., spores, seeds etc. Gene flow ensures that all population of a given species share a common gene pool, i.e., it reduces difference between populations. |