why eggs of frogs have a layer of jelly around them . urgent
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Eggs of frogs have a "jelly" coat around them that serves them in many ways.
It prevents too many sperm from getting to the egg at the same time, because of its viscosity.
Proteins in the jelly initiate the acrosome reaction in sperm so they are ready to fertilize the egg.
It provides a sort of "shock absorber" to prevent injury to the egg from wave action.
It is colorless, so it is difficult to see.
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In many species, the eggs are enclosed in a jelly coat that acts to enhance their size (so they won't be as easily eaten), to protect them against bacteria, and to attract and activate sperm. Sperm also occur on a seasonal basis. ... In most species offrogs, fertilization is external
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