3. Which statement concerning an ecosystem is correct?
A) It can exist with or without a constant source of
energy input.
B) It must contain consumers but can exist without
producers.
C) It involves interactions between biotic and
abiotic factors.
D) It can exist on land, but it cannot exist in lakes,
rivers, or oceans.
Answers: 2
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3. Which statement concerning an ecosystem is correct?
A) It can exist with or without a constant...
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