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leva [86]
3 years ago
8

I’m not sure what it means for the cell membrane to be semi-permeable

Biology
1 answer:
Lesechka [4]3 years ago
8 0

Answer:

It means that the cell membrane allows certain substances to pass through and not others. As the cell membrane consists of a phospholipid bilayer with a hydrophobic core, only small uncharged hydrophobic molecules can pass through the cell membrane e.g. glucocorticoid and other larger charged particles require transporters or channel proteins to pass through the cell membrane, e.g. glucose.

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There are many methods to increase the amount of food produced. Which
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<em>The overuse of pesticides</em>

Explanation:

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The energy associated with an object's position is termed
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The answer to this is mechanic energy. 
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If an organism's cells are reproducing, then the organism must be A.growing.B.reproducing.C.alive.D.all of these
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Explanation:

6 0
3 years ago
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Assuming average nucleosome spacing throughout the genome, how many molecules of histone H2A are present in the chromatin of one
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Explanation:

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Korolek [52]

Answer:

B. Fewer pesticides are needed because of parasitoids.

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