Evidence for Evolution

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DNA evidence suggests that whales’ and hippos have a common ancestor. According to this evidence, the most recent common ancestor was a(n)

A __________ is formed when an organism is buried in sediments and the sediments change into rock.

Scientists can measure the actual age of a fossil or rock by a method called

Sometimes organisms decay and leave a cavity. When the cavity fills with sand or mud and hardens, it is called a

Which of the following is an example of a vestigial structure?

Which of these cases provides embryological evidence that two species share a common ancestor?

The two types of fossils that are formed in rocks are

William discovered that two modern-day species have very similar DNA. He concludes that the two species are closely related. What type of evidence did William most likely use to reach his conclusion?