• anonymous
(1 point). Which is true about ecosystems? A. Biotic and abiotic factors are the same in most ecosystems. B. Once defined, and ecosystem is a unit scientists can analyze. C. All ecosystems are identical. D. All ecosystems are the same size.
  • Stacey Warren - Expert
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  • chestercat
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  • Rushwr
It should be B. A is wrong because biotic factors can't be abiotic at the same time. Biotic means living and abiotic means non- living C is wrong cuz no ecosystem is identical. Not a single thing is identical here. D ecosystems vary in their sizes at least by 1 centimeter. SO B is the answer :)

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