The plasma membrane and several cytoplasmic organelles such as the ER, Golgi apparatus, secretory granules and vesicles, lysosomes, endosomes, form an endomembrane system.
Good luck!
Constant means non-changing, so constant would refer to something that stays the same, does not change.
So the correct answer is this one: the quantity that must remain the same
Answer:
what readings
Explanation:
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