Birds and reptiles share a relatively recent common ancestor. Yet birds and mammals both have a four-chambered heart; most reptiles have a three-chambered heart. How do these facts affect our interpretation of phylogenetic trees for these groups?

In the Lake Victoria cichlids, what appears to be contributing to fusion of different species?

Why is Darwin considered original in his thinking?

IF: Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism THEN: Approximately what percentage of the nucleotides in this sample will be thymine?

Which of the following terms means the policy covers all perils EXCEPT the ones specifically named as excluded perils? (Select all that apply)

The Galápagos finches collected by Darwin are thought to have descended from a very small parent population. Different species of finches that are confined to only one or two islands most likely arose by _____.

Ancient cyanobacteria were very important in the history of life because they _____.

Lloyd’s of London is an insurance company.

All of the following are characteristics of an ideally insurable risk except

Which of the following statements are true regarding the various requirements of an insurance contract? (Select all that apply)