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Explain the primary differences between sea urchin and frog development during the processes of fertilization, cleavage, and...

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Biology

  1. Explain the primary differences between sea urchin andfrog development during the processes of fertilization, cleavage,and gastrulation. In your answer, provide a basic description ofeach process, describe the developmental stage that results,explain the differences between sea urchin and frog embryos, anduse the terms cortical reaction, cortical rotation, induction, andinvolution.

Fertilization:

Cleavage:

Gastrulation:

Answer & Explanation Solved by verified expert
4.5 Ratings (751 Votes)
FERTILIZATIONIn sea urchin the mode of fertilisation is external ie thesperm and eggs are released in the water by male and femalerespectively The sperm gets attracted by the chemicals released bythe egg in the water chemotactic movement This chemical calledresact gives the sperm direction and increases the speed of itsmovement This way the sperm finds the egg Of similar species inthe water On fertilisation the egg the sperm induces egg    See Answer
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