Multiple choice

Ascaris is:

  1. a parasite

  2. an autotroph

  3. facultative autotroph

  4. facultative heterotroph

  5. heterotroph
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A Correct answer
Explanation

Ascaris is a parasite that lives in the human intestine and absorbs nutrients from the host's digested food. Autotrophs produce their own food (plants). Facultative organisms can switch modes, but Ascaris is exclusively parasitic. Calling it a 'heterotroph' is less specific than 'parasite'.

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