Practice Test

Question 1

Osteichthyes is a group of fish that have the derived characteristics of jaws and true bones. Which letter corresponds to where Osteichthyes belongs on the cladogram?

Revolt · Accepted Answer

A

Question 2

Which is the best description of the two organisms highlighted in orange?

Revolt · Accepted Answer

They share a recent common ancestor.

Question 3

How long ago do scientists believe the continents formed Pangaea?

Revolt · Accepted Answer

about 300 million years ago

Question 4

In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. What can be determined from this information?

Revolt · Accepted Answer

Jellyfish existed before trilobites and ammonites.

Question 5

Why do a chicken embryo and a cow embryo look very similar even though the adults do not?

Revolt · Accepted Answer

They are distantly related, so their development is similar.

Question 6

Which statement describes the law of superposition?

Revolt · Accepted Answer

In horizontal rock layers, each layer is younger than the one below it.

Question 7

Which important event in Earth’s history occurred during the Jurassic period?

Revolt · Accepted Answer

The first birds emerged on Earth.

Question 8

Which phrase describes faults?

Revolt · Accepted Answer

cause rocks to break and move

Question 9

What happened to the giant landmass that Wegener described?

Revolt · Accepted Answer

The pieces broke apart and drifted away from one another over time.

Question 10

What determines the length of a geologic time period?

Revolt · Accepted Answer

fossil record

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