3.2A - Match the following scenarios to the type of speciation taking place A po

Question

3.2A - Match the following scenarios to the type of speciation taking place A population of 100 squirre sudden earthquake changes causing it to diverge through [ Choose ] Sympatric Speciation via Behavioral Isolation Allopatric Speciation via Vicariance Allopatric Speciation via Dispersal Sympatric Speciation via Ecological Isolation lives in a lush green valley the flow of the local river, the center of the valley About 45 squirrels are trapped on the east river bank, while the other 55 squirrels are trapped on the west river bank. The river is impassable. After thousands of years, the two sub- populations of squirrels accumulate differences that make them reproductively isolated. A male frog attracts mates by Sympatric Speciation . croaking a love song in the middle of the night. Some frogs croak at a very high pitch, and other frogs croak at a very low pitch. Certain females are attracted the the high-pitch male frogs, while other females are attracted to

Explanation / Answer

3.32A.

1. Allopatric speciation via vicariance.

The squirrels are isolated by geographical isolation which is a physical barrier, a local river.

2. Sympatric speciation via behavioral isolation.

Sympatric speciation does not require geographic isolation. In this case, preferences of the high or low croak pitches help in mate choice and thus contribute to speciation.

3. Sympatric speciation via ecological isolation

In this case, the lizards live in same geographic area but occupy different habitats i.e top of the canopy and the forest floor.

4. Allopatric speciation via dispersal.

In this case, the 15 seagulls disperse to a remote island by a strong storm. These segulls will be separated from the mainlaind by water.

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