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solution to sea urchin problem

Discussion in 'DAT Discussions' started by Tigerlili, Jul 19, 2006.

  1. Tigerlili

    Tigerlili Junior Member
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    Hey guys,

    I was wondering what the consensus on the answer for the sea urchin problem was. The question was "why does the sea urchin develop a membrane after fertilization?" is it to prevent polyspermy???

    Thanks!
     
  2. allstardentist

    allstardentist All-Star
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    yes
     
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  3. issa

    issa Senior Member
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    this question is kind of difficult. we didn't cover it in my zoology class. are the rest of the bio questions in the real dat easier than this or not?
     
  4. allstardentist

    allstardentist All-Star
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    should be. but i havent taken it so....
     
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  5. rockets32

    rockets32 Junior Member
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    I actually had a lab where we did this experiment. After fertilization, we actually saw the sperm come close and bounce away from the membrane :laugh:
     
  6. DMD-2-B

    DMD-2-B Senior Member
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    Well that's kind of a weird question. "Why does the sea urchin develop a membrane after fertilization?" Why is a weird question. It's like saying "Why does an egg undergo cleavage?" It's age-old mystery we'd all like to know - the drive behind life sort of thing.

    However, if the question is "What is the function of the fertilization membrane formed by the sea urchin egg after it is penetrated by one sperm?" the answer would be "To provide a long-term block against polyspermy."
     

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