Question

1. some birds have inherited a variation that makes them immune to a certain virus that infects the bird species is an advantage of_

a) asexual reproduction
b) sexual reproduction

Explanation:

The question is about the advantage of a variation (likely a genetic variation) in birds related to immunity against a virus, and how it relates to reproduction types. Sexual reproduction (option b) allows for genetic variation through processes like recombination, which can lead to beneficial adaptations like immunity to viruses. Asexual reproduction (option a) produces genetically identical offspring, so less variation for adapting to such threats. So the advantage of the variation (for immunity) is linked to sexual reproduction as it promotes genetic diversity.

Answer:

b) sexual reproduction