AnswersCO-Biology B-CRUnit Test

Unit Test — Cumulative exam Answers

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21
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Natural resources are classified as renewable and nonrenewable. What is the difference between the two?

A
whether or not the resource exists in nature
B
whether or not the resource can be replaced
C
whether or not the resource dwindles in supply
D
whether or not the resource is useful to humans
22
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Populations of organisms that exhibit a high degree of variation have a greater chance for survival than populations of organisms that show little variation. This statement is

A
always true.
B
usually true.
C
rarely true.
D
never true.
23

Gunther touched a hot object and received a minor burn. How did the skeletal system help prevent further damage?

A
The skeletal system helped him move his hand away from the hot object.
B
The skeletal system made red blood cells to heal the injury.
C
The skeletal system helped him sense that the object was hot.
D
The skeletal system protected the nervous system so pain sensations could not be felt when he touched the hot object.
24

What is the function of the type of muscle that is pictured below?

Question illustration
A
support and movement of the skeleton
B
movement of food through the digestive system
C
contraction and relaxation of the heart
D
generation and conduction of electrical signals
25

How will Richard’s body react when a friend jumps in front of him and scares him?

A
Richard’s central nervous system will take over, and his peripheral nervous system will play a lesser role.
B
Richard’s peripheral nervous system will take over, and his central nervous system will play a lesser role.
C
Richard’s sympathetic nervous system will take over, and his parasympathetic nervous system will play a lesser role.
D
Richard’s parasympathetic nervous system will take over, and his sympathetic nervous system will play a lesser role.

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