SI units are a modern form of the metric system.
<span>The formation of the fertilization envelope (slow-block to polyspermy) requires an increase in the availability of </span>calcium ions.
Slow-block to polyspermy is also called cortical reaction. In this reaction, the sperm will be permanently blocked by cortical granules. The release of calcium ion will trigger this reaction.
The answer is B. Eukaryotes
Eukaryotes organisms that are made of cells that have a nucleus.
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Answer:
I think it's A: Sodium is needed to generate an action potential