What evidence is there that the 15 species of finch all evolved from one common ancestor?(1 point)

Question

Responses

Observation of all 15 species shows that they look incredibly similar, with minor changes to beak size and shape.
Observation of all 15 species shows that they look incredibly similar, with minor changes to beak size and shape.

DNA analysis shows that their DNA is almost identical with only minor changes.
DNA analysis shows that their DNA is almost identical with only minor changes.

Scientists have been studying them since Darwin in 1835 and have watched them evolve.
Scientists have been studying them since Darwin in 1835 and have watched them evolve.

These 15 species are found nowhere else in the world, and the islands are located close enough to the mainland for birds to migrate.

Answer 1

All the responses you provided offer some level of evidence, but the strongest evidence that the 15 species of finch evolved from a common ancestor is:

DNA analysis shows that their DNA is almost identical with only minor changes.

This genetic evidence provides a clear indication of how closely related these species are, supporting the idea of common descent. The other responses mention physical similarities, historical observations, and geographical factors, which can also contribute to the understanding of evolution, but DNA analysis offers the most direct evidence of evolutionary relationships.