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Section 3.2
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1
In terrestrial ecosystems, dominant species are…
A)primary producers.
B)primary consumers.
C)secondary consumers.
D)tertiary consumers.
2
Why are sea otters classified as keystone producers?
A)Sea urchins are toxic to sea otters.
B)Kelp forests are protected by the sea otters.
C)Sea otters consume small quantities of fish.
D)Sea otters keep sea urchin populations in control.
3
Which of the following species is best known as an ecosystem engineer?
A)bacteria
B)beaver
C)basket-tail dragonfly
D)prairie dog
4
Captive breeding programs…
A)release recaptured animals back into the wild.
B)cause rare and endangered wildlife to become extinct.
C)allow rare and endangered wildlife to increase their population size.
D)focus on keystone species.
5
Which of the following best illustrates a situation that would lead to succession?
A)maintaining a wetland ecosystem
B)ecologists declaring an area a biodiversity hotspot
C)creation of a beaver dam
D)use of canopy fogging to conduct species sampling





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