Multiple Choice
Why do ecologists say that Earth is a closed system for matter?
A) They say this because there are no new inputs of matter.
B) They say this because there is no net loss of matter.
C) They say this because matter cycles in and out of organisms in ecosystems.
D) They say this because matter stays in the biosphere.
E) All of the above are correct.
Correct Answer:
Verified
Correct Answer:
Verified
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