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

Question

Responses

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.

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

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.

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

Answer 1

The most compelling 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 molecular evidence supports the theory of common descent and indicates that these finches share a recent common ancestor, fitting within the framework of evolutionary biology. Additionally, the observation of similarities along with variations in beak size and shape, as well as their geographic isolation, can further corroborate this conclusion. However, the DNA analysis provides a strong, quantifiable basis for understanding their evolutionary relationship.