Answer:
lactose, repressor, RNA polymerase (or mRNA might fit here), transcription, repressor, RNA polymerase
Explanation:
Hope this will help.
The structure<span> of cells is linked to </span>their function<span>. For example, lung cells are very thin, which allows gases to diffuse easily through the cells</span>
A flatworm does not have a body cavity.
The answer is: an "instinct" .
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