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#Question id: 5598


The vitelline envelope of the sea urchin egg

#Unit 5. Developmental Biology
  1. is outside of the fertilization membrane

  2. releases calcium, which initiates the cortical reaction

  3. has receptor molecules that are specific for binding acrosomal proteins

  4. is first visible only when organogenesis is nearly completed


Answer:- Option(s): 3


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