The structure that would be found in non-photosynthetic prokaryotes is the nucleus. The correct option is D.
What is prokaryotes?
Prokaryotes are organisms that do not have distinct nucleus and cell organs.
They are single celled organisms and are microorganisms. Bacteria are prokaryotes.
They are covered by a cell wall which is a capsule, and cilia or flagella are present.
Thus, the correct option is D. nucleus.
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