Why can’t you just write a paragraph?
<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.
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<em>The correct characteristics are - tissue, coelom, segmentation, endoskeleton, and backbone from top to bottom boxes.
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Answer:
The correct answer is <u>False</u>
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Answer B burning fossil fuels in vehicles, power stations, and factories
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