AnswersTPS EdX BiologyBiological Evidence and the Fossil Record

Practice Test Answers

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1
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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?

A
A
B
B
C
C
D
D
2
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Which is the best description of the two organisms highlighted in orange?

A
They are ancestors of each other.
B
They belong to the same species.
C
They are separated by two nodes.
D
They share a recent common ancestor.
3

How long ago do scientists believe the continents formed Pangaea?

A
about 135 million years ago
B
about 300 million years ago
C
about 4 point 5 billion years ago
D
about 180 million years ago
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?

A
Trilobites existed before jellyfish and ammonites.
B
Ammonites existed before trilobites and jellyfish.
C
Jellyfish, trilobites, and ammonites lived together.
D
Jellyfish existed before trilobites and ammonites.
5

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

A
The genetic makeup of the two species changes during development.
B
They are not related, but still have similar development.
C
They are distantly related, so their development is similar.
D
The embryos mutate in utero to form different structures.
6

Which statement describes the law of superposition?

A
Rocks that are not in horizontal layers were shifted by some geologic event.
B
Rock layers must be in existence before something can happen to them.
C
Sedimentary rocks were originally in horizontal layers.
D
In horizontal rock layers, each layer is younger than the one below it.
7

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

A
Mammals were in search of food.
B
The first birds emerged on Earth.
C
Treelike ferns first began to grow and populate.
D
Animals with shells emerged on Earth
8

Which phrase describes faults?

A
are igneous rocks that form beneath Earth’s surface
B
cause rocks to break and move
C
are older than surrounding rocks
D
cause gaps in the geologic record
9

What happened to the giant landmass that Wegener described?

A
The pieces moved quickly to their current locations.
B
The pieces broke apart and drifted away from one another over time.
C
The pieces moved toward one another and created mountains.
D
The pieces remained the same shape over time.
10

What determines the length of a geologic time period?

A
radioactive materials
B
fossil record
C
material density
D
meteors and rocks

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Practice Test Answers — TPS EdX Biology