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Which of the following statements is a correct distinction between autotrophs and heterotrophs?

1. Only heterotrophs need to acquire chemical compounds from the environment
2. Cellular respiration is unique to heterotrophs
3. Only heterotrophs have mitochondria
4. Autotrophs, but not heterotrophs, can nourish themselves beginning with nutrients that are entirely inorganic

Correct answer: Autotrophs, but not heterotrophs, can nourish themselves beginning with nutrients that are entirely inorganic

Solution

Autotrophs can synthesize their own organic molecules from inorganic inputs such as carbon dioxide, water, and minerals. Heterotrophs cannot do this and must obtain organic compounds from other organisms or their remains.

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