Question

Choose the correct answers from the alternatives given.
Some species of Anopheles mosquito live in brackish water, some in running fresh water, and others in stagnant water. What type of reproductive barrier is most obviously separating these different species?

• A. Ecological isolation
• B. Temporal isolation
• C. Behavioural isolation
• D. Postzygotic barriers

Answer 1

The correct option is A Ecological isolation

Populations may occupy the same territory but live in different habitats and so not meet are called Ecological isolation. Example the Anopheles maculipennis group consists of six species, some of which are involved in the transmission of malaria. Although the species are virtually indistinguishable morphologically, they are isolated reproductively, in part because they breed in different habitats. Some breed in brackish water, others in running fresh water, and still others in stagnant fresh water.

So, the correct answer is Ecological isolation.