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Squirrels and chipmunks compete for the same food source. What is most likely to happen to the degree of competition between these two species if their food became scarce?

A
decrease
B
increase
C
stay the same
D
disappear
22
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Which disturbance would result in primary succession?

A
harvesting wheat by using a combine harvester at the end of the growing season
B
controlled burning to stimulate the growth of forest trees such as sequoia
C
the formation of Surtsey, a volcanic island off of the southern coast of Iceland
D
the effect of a large herd of elephants on the grasses and shrubs in an area
23

Which factor can cause secondary succession?

A
clear cutting
B
glacial melting
C
competition
D
predation
24

What is an organism’s niche?

A
the physical environment of the organism
B
the role that an organism plays in the environment
C
the traits that increase an organism’s survival
D
the competitors and predators of the organism
25

Which of the following could result in the extinction of a species?

A
harsh restrictions on poachers
B
increase in the habitat size of a species
C
adding a new species to the habitat
D
decrease tourism in protected areas

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Test — Test Answers — Biology VIA Fall 2026…