Question

in addition to the beak differences, which statement indicates that the different finch populations found throughout the galápagos islands have experienced speciation?
○ they can no longer interbreed.
○ they are different colors.
○ they are different sizes.
○ they eat different foods.
○ they can no longer fly from island to island.

Explanation:

Speciation is defined as the process by which new species form, and a key indicator of distinct species is reproductive isolation—meaning populations can no longer interbreed to produce fertile offspring. Differences in color, size, food sources, or flight ability are phenotypic variations but do not confirm speciation; only the inability to interbreed meets the biological species concept criterion for speciation.

Answer:

They can no longer interbreed.