Nila noticed that her pet birds have short beaks. This helps the birds to ____________.
Read the passage and answer the following questions:
A population of birds (population A) on a remote, isolated island is studied to determine beak length. The resulting data are plotted in Figure 1.
Figure 1
Suppose that 200 years later, the beaks of the birds on the island were again measured (Population B). The data, when plotted, yielded a graph as in Figure 2.
Figure 2