Question

The mechanism in which mating is prevented between individuals of different groups due to structural differences is known as

• A. Geographical isolation
• B. Mechanical isolation
• C. Temporal isolation
• D. Hybrid sterility
• E. Behavioral isolation

Answer 1

The correct option is B Mechanical isolation

Physical separation of groups preventing the gene flow between them leads to geographical isolation. Incompatible differences in reproductive structures leading to prevention of cross-fertilization refer to as mechanical isolation. Different periods of attainment of sexual maturity lead to temporal isolation. Hybrid sterility is one of the post-zygotic isolation. Incompatible premating behaviour leading to no attraction between groups for mating is termed as behavioural isolation. Thus, the correct answer is B.