In the Case of Darwin's Finches,an Ancestral Finch Species from the Mainland

question 73

Multiple Choice

In the case of Darwin's finches,an ancestral finch species from the mainland arrived on the Galápagos Islands and soon developed into many new species via adaptive radiation.The finches did NOT undergo adaptive radiation back on the mainland.What is the most plausible biological explanation?

• A)Directional selection works better on islands.
• B)Competition from many other bird species on the mainland provided stabilizing selection that was absent on the islands.
• C)The environment on the mainland was completely uniform.
• D)The founder effect greatly expanded the variation in alleles in the Galápagos finch gene pool.
• E)The ancestral mainland finch was reproductively isolated.

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Definitions:

Animal Kingdom

A broad classification encompassing all living and extinct animals, characterized by multicellular, eukaryotic organisms that are typically mobile.

Songbirds

A group of birds known for their ability to produce complex vocal sounds, often studied in research on vocal learning and brain function.

Creolization

Creolization refers to the process in which cultural or linguistic elements blend to form a new, distinct identity or language, often in contexts of colonization.

Process

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