They are both ways to reproduce hope this helps!!
Part a: Plasma Membrane
part b:<span> The basic function of the </span>cell membrane<span> is to protect the </span>cell<span> from its surroundings.
part c: and hang on one second for this last part, ill answer just need to find some note, will take like 1min.
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Answer:
1) Gene expression can be modified by Interactions with the environment
Explanation:
Environment factors such as temperature change for instance affects the expression of the genes for a particular trait and these genes can be modified too.