13. The sum of a species’ use of the biotic and abiotic resources in its environment is called the species’ _________?
(A) niche
(B) ecological niche
(C) resource niche
(D) environment niche
(E) ecological statement

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統計: A(12), B(32), C(2), D(6), E(3) #939003

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生態地位:指生物體在環境中所利用的生物和...
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