Some features in organisms can be compared to spandrels in architecture in that, although they appear to have a function, they are really just there because of the evolution of other structures. This analogy is used as an argument for care in identi

In humans, the pelvis and femur, or thigh bone, are involved in walking. In whales, the pelvis and femur shown in Figure 15-1 are

How do fossils demonstrate evidence of evolution?

On the islands of Hawaii there are a group of about 30 species of highly variable, but closely related, species of plants called silverswords. These species appear to be related to a small group of plants in North America. What are the silverswords

An adaptation is an inherited characteristic that can be

When allelic frequencies remain unchanged, a population is in genetic equilibrium. This statement expresses which of the following?

Which of the following is NOT a factor that causes changes in the frequency of homozygous and heterozygous individuals in a population?

Which of the following lines of evidence for evolution is indirect?

To be in Hardy-Weinberg equilibrium, a population must be

Mutations in the DNA of genes that can be passed on to offspring

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