Question

A population of birds lives on a small island. Another population of the same species lives on the mainland. The distance between the island and the mainland is too great for birds to fly back and forth. Recently, a series of sandbars and tiny islands have formed between the island and the mainland.

Answer 1

Answer:

They may have genetically drifted apart and form variations. They may not be able to reproduce with each other.

Answer 2

They are allopatric species.

Explanation:

Due to the geographical boundaries the species acquire different modes of adaptation. The species on the different island have evolved according to their current surrounding.

The allopatric species of birds cannot mate due to the change in climate their mating behaviour.

The population of birds may have undergone genetic divergence and can differ in the heritable traits received over the generation.

Geneflow would get stop leading to genetic variation.