Why would a finch population that lives on an island have a higher rate of speciation than a finch population that lived in a large forest in North America?

AThe island finches have higher genetic drift.
BThe island finches have more spatial isolation.
CThe island finches have more behavioral isolation.
DThe island finches will mutate more frequently.

Question

18-04-2016
Biology

Answered

Why would a finch population that lives on an island have a higher rate of speciation than a finch population that lived in a large forest in North America?

AThe island finches have higher genetic drift.
BThe island finches have more spatial isolation.
CThe island finches have more behavioral isolation.
DThe island finches will mutate more frequently.

Verified Answer :

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JcAlmighty JcAlmighty · Answer 1 · 2016-04-22T12:54:31-04:00

The answer is B. The island finches have more spatial isolation.

The island finches are more spatially isolated than the large forest finches. Thus, gene pool on the island is more limited regarding the genetic possibilities. For that reason, the island finches will have more geneflow. So, it is a greater possibility for them to pass on some specialized traits to the next generation. This will result in a higher rate of speciation of the island finches than the large forest one.

keshavgandhi04 keshavgandhi04 · Answer 2 · 2022-06-06T09:15:09-04:00

The island finches have more spatial isolation. Thus the correct option is B.

What is spatial population?

Spatial distribution describes how spread out a population is (as in what area it occurs in), while population density describes how many individuals are found in a given area.

The island finches are more spatially isolated than the large forest finches. Thus, gene pool on the island is more limited regarding the genetic possibilities. For that reason, the island finches will have more gene flow.

So, it is a greater possibility for them to pass on some specialized traits to the next generation. This will result in a higher rate of speciation of the island finches than the large forest one.

For more information regarding spatial isolation, visit:

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