Glencoe Biology

Chapter 14: The History of Life

Chapter Test Practice

1
A ____ is a scientist who studies fossils.
A)paleontologist
B)ecologist
C)botanist
D)zoologist
2
Early cyanobacteria produced ____ which eventually formed the ozone layer.
A)hydrogen
B)proteins
C)carbon dioxide
D)oxygen
3
Look at this graph indicating carbon-14 decay. What is significant about the point in which C-14 has decayed 5730 years?

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A)This is called the half-life.
B)Total decay has occurred.
C)Eighty percent decay has occurred.
D)This is called the quarter-life.
4
Many scientists consider ____ to be the first cellular coding system.
A)meiosis
B)photosynthesis
C)RNA
D)complex proteins
5
The ____ era began with Cambrian explosion and ended with a mass extinction.
A)Cambrian
B)Paleozoic
C)Mesozoic
D)Cenozoic
6
This shows that ____ helped amino acids stabilize.

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A)oxygen
B)proteins
C)clay
D)hydrogen
7
What modern cells do scientists believe to be close relatives of the Earth's first cells?
A)archea
B)amino acids
C)eukaryotes
D)proteins
8
What theory suggests the important relationship between ancestral eukaryotic and prokaryotic cells?
A)spontaneous generation
B)early cellular theory
C)prokaryotic theory
D)endosymbiont theory
9
Which of layer indicates a period in which large land animals appeared? (layer A is the top and layer F is the bottom)

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A)layer B
B)layer D
C)layer E
D)layer C
10
Which statement is not true of fossils?
A)Some bacteria can form fossils.
B)Most extinct organisms have been preserved.
C)A small percent of extinct organisms are preserved.
D)Plants can form fossils.
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