Organisms And Population Question 235
Question: Which of the following is not true for a species [CBSE PMT 2005]
Options:
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
Show Answer
Answer:
Correct Answer: B
Solution:
Gene flow means the spread of genes through populations as affected by movements of individual and their propagules e.g., spores, seeds 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.
BETA
