A new river forms and splits two populations, causing ______________ speciation

Orcas occur in the same habitat but some are avoiding each other and do not interbreed. They have different diets, vocal behavior, and social structures. What type of speciation is this?

The emergence of new rivers or streams is a type of ____________ isolation.

When the Grand Canyon in Arizona formed, two populations of one squirrel species were separated by the giant canyon. This is an example of _____________ speciation.

Different finch populations lived on separate islands with different environments. They evolved to best adapt to those particular environments and can no longer mate. What type of speciation is this?

Which one of the following shows discontinuous variation?

Click on all of the following that show continuous variation?

What type of graph do we use for discontinuous variation?

The total number of alleles in a population is the population’s..

Males of different species of the fruit fly Drosophila that live in the same parts of the Hawaiian island have different elaborate courtship rituals that involve fighting other males and stylized movements that attract females. What type of reproductive isolation does this represent?

Some species of Anopheles mosquito live in brackish water, some in running freshwater, and others in stagnant water. What type of reproductive barrier is most obviously separating these different species?

Two species of frogs belonging to the same genus occasionally mate, but the offspring do not complete development. What is the mechanism for keeping the two frog species separate?

Which of the following contribute to the evolution of new species?

A. gene mutation

B. polyploidy

C. natural selection

D. hybridization

When has speciation occurred?

This image demonstrates

This image demonstrates

True or False? Polyploidy plays no role in evolution, while polysomy does.

The Bonsmara cattle are a good example of ____in animals.