Exam 15: The Origin of Species

The formation of a new species

Speciation can occur when populations of a species are separated by a physical barrier becoming ________ isolated and subsequently reproductively isolated from one another.

A biological species is a group of interbreeding populations that is ________ isolated from other species of organisms living in the same region.

Hair is an analogous feature in the different mammal species.

Adaptive radiation gives rise to

If a murky lake is stocked with a number of species of cichlid fish from Lake Victoria,what is most likely to happen?

A desert plant in North America and one in Africa both have similar spines that they did not inherit from a common ancestor.The spines are ________ to each other.

Individuals of the same species generally

Adaptive evolution

For two populations to accumulate enough genetic differences to cause speciation,the factors that promote these differences

Convergent evolution frequently occurs when two unrelated species

Evidence suggests that Neanderthals and humans are the same species.

Two species live near each other but do not respond to each other's courtship displays.This is an example of ________ isolation,a type of prezygotic barrier.

The willow flycatcher and the least flycatcher are similar in appearance,and in many regions of the United States,their ranges overlap.The two organisms do not interbreed.Based on this information,willow flycatchers and least flycatchers are

The fact that Neanderthal genes were found in the modern human genome suggests that these two species interbred at some point,creating human-Neanderthal ________.

Which of the following is an example of a prezygotic barrier that can isolate two species living in the same geographic area?