Answers26-27 - C - RUSD Biology in the Living EarthEcosystem Interactions and Energy

Ecosystem Interactions and Energy — Test Answers

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21
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Which organism obtains its energy exclusively from dead or decaying matter?

A
daisy
B
groundhog
C
bacteria
D
human
22
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Which explanation is best supported by the numbers in the chart?

A
Overhunting of lion and cheetah populations has led to a decline in the food source population.
B
Lion and cheetah populations compete for the food source of zebras, and cheetahs outcompete lions.
C
The dwindling zebra population has led to the decline of the predator lion and cheetah populations.
D
Lion and cheetah populations compete for the food source of zebras, and lions outcompete cheetahs.
23

Which best describes what is occurring in this population of squirrels?

A
Population growth is increasing.
B
Population reaches carrying capacity.
C
Population growth is decreasing.
D
Population growth stays the same.
24

The group of ecosystems on Earth that feature climate, vegetation, and wildlife similar to the Everglades is

A
a biome.
B
a community.
C
a population.
D
a biosphere.
25

Which of these facts about wild boars is best supported by the evidence provided?

A
Wild boars have a high reproductive rate and no natural predators.
B
Wild boars were brought to the United States by humans.
C
Wild boars have established successfully mostly in areas with warm climates.
D
Wild boars have quickly spread through the United States.

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