Author Question: The recent study (1973) by the Grants in the Galapagos Islands documented a drought that ... (Read 760 times)

kellyjaisingh · **on:** Aug 11, 2018

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

Question 2

A population of finches contains individuals with beaks that range from small to large. Finches with larger beaks can more easily break shells and extract food in times of stress.

If the environment becomes very dry and most plants (food) die, then there will be __________.
A. no change in the percentages of finches with large and small beaks
B. more finches with smaller beaks
C. an increase in all types of finches
D. more finches with larger beaks