Question

speciation observations
how do beak sizes change over the course of 100 generations?
nice work completing the last challenge. it seems like a geographic divide can isolate a population of finches and over time, cause them to separate into two species.
which best summarizes what happened to the traits on each side of the island after 100 generations?
beak depth changes from average size to favoring the small beaks on both sides of the island.
beak depth changes from average size to favoring large beaks on one side and small beaks on the other side of the island.
beak depth remains average sized on both sides.
beak depth changes from average size to favoring the large beak size on both sides.

Explanation:

Speciation often involves trait - divergence. In the context of finches, geographic isolation can lead to different selective pressures on either side of the divide. The third graph shows a split into two distinct groups, likely due to different environmental conditions on each side of the island favoring different beak sizes.

Answer:

Beak depth changes from average size to favoring large beaks on one side and small beaks on the other side of the island.