The recent study (1973) by the Grants in the Galapagos Islands documented a drought that dramatically changed the availability of food to the island’s finches. Finches with larger beaks tended to survive the drought over other finches with smaller beaks. This study illustrates __________.
A. mutation
B. organic change
C. random choice
D. natural selection
Answer:D
The recent study (1973) by the Grants in the Galapagos Islands documented a drought that dramatically changed the availability of food to the island’s finches. Finches with larger beaks tended to survive the drought over other finches with smaller beaks. This study illustrates __________.
A. mutation B. organic change C. random choice D. natural selection