Question

When members of a population attain sexual maturity at different times preventing interbreeding, it is termed as ________ isolation

• A. Seasonal
• B. Mechanical
• C. Habitat
• D. Ethological

Answer 1

The correct option is A Seasonal

• There are different mechanisms of reproductive isolation. Isolation mechanism which prevent interspecific crosses includes seasonal isolation, mechanical isolation, habitat (ecological) isolation, ethological isolation, physiological isolation, etc.
• All these are premating isolation meaning isolation that prevents mating from even happening. When members of a population attain sexual maturity at different times preventing inter-breeding, it is called seasonal or temporal isolation.
• When a lack of sexual attraction between opposite sex preventing inter-breeding, it is termed as ethological isolation.
• When there is a difference in size, shape or location of the genitalia of the males and females preventing inter-breeding, it is termed as mechanical barrier.
• When two species are ecologically or geographically separated preventing inter-breeding, it is termed habitat isolation.

Thus, the correct answer is option A.