Question

In black swan, invariable cross-fertilization takes place.

• A. True
• B. False

Answer 1

The correct option is B False

In black swans, one-quarter of the males are observed to be bisexual. They are most often found involved with males. They often steal a nest and perform a threesome with one female also involved. Hence, it cannot be said that black swans perform invariable cross-fertilization.

So, the correct answer is 'False'.