[Campbell Biology P.521] Based on Darwin's observations on the Galápagos Islands, which of t... | Practice Question

Based on Darwin's observations on the Galápagos Islands, which of the following statements are true?

  • A: Most Galápagos species were also found on the South American mainland.
  • B: Mockingbirds on different Galápagos islands were similar but appeared to be distinct species.
  • C: Some species were unique to individual islands, while others inhabited multiple adjacent islands.
  • D: Organisms on the Galápagos showed no resemblance to species from the South American mainland.

Explanation

The text states: 'The birds he collected included several kinds of mockingbirds. These mockingbirds, though similar to each other, seemed to be different species. Some were unique to individual islands, while others lived on two or more adjacent islands. Furthermore, although the animals on the Galápagos resembled species living on the South American mainland, most of the Galápagos species were not known from anywhere else in the world.' This confirms B and C, and refutes A and D.