1) Darwin's finches are an example of adaptive radiation, the evolution of an animal or plant group into different types adapted to specialized
ways of life. Their common ancestor arrived on the Galapagos about
two million years ago. Over time, Darwin's finches have evolved into
15 recognized species differing in body size, beak shape, song and
feeding behavior. The picture here shows finches with four different
types of beaks, What statement best represents how one species of
finches became many?
Eliminate
in order to survive, the finches with different beaks
flew to the island with the best food source for each
A)
beak type. Over time they evolved into different
species
The finches became isolated from one another on
different Islands, Finches developed the beaks that
B)
would best help them survive, over time evolving
into different species,
Each island was different and presented different
food sources, there were already different finches on
C) each of the islands, over time scientists were able to
better assess these differences, cataloging the
different species
The finches became isolated from one another on
different Islands, Because each island was different
and presented different food sources, those finches
D)
with the beak type best fit for each island ecosystem
survived to reproduce, over time evolving into
different species