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Practice MCAT Question - Q84 - Answer!

Which of the following microorganisms act as decomposers vital to the ecological health of our planet?

A.  Prokaryotes
B.  Fungi
C.  Plants
D.  A and B

The correct answer is (D). Both prokaryotes and fungi have many species that are saprobes or decomposers. Plants, which rely on photosynthesis for their food molecules, are “producers” (autotrophs).

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