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Biology: Why does dry mass of a germinating seed decrease?

Discussion in 'Cambridge IGCSE' started by Rashu712, May 28, 2011.

  1. Rashu712

    Rashu712

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    According to the Marking Scheme, the Answer is A.

    Which means the dry mass decreases first and then increases.

    Why does this happen?





    May/June 2007 Session - Biology Paper 1
     
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  3. Keeemoman

    Keeemoman

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    Re: Biology: Why does dry mass of a germinating seed decreas

    Because it uses up the stored food in the cotyledon in order to grow
     
  4. Outofideaz

    Outofideaz

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    Re: Biology: Why does dry mass of a germinating seed decreas

    Because the seed uses the stored food in it until it is able to photosynthesise on its own .... later it increases as the seed grows new leaves which can photosynthesise so the dry mass increases
     
  5. BAOOZHEN

    BAOOZHEN

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  6. Numra N.S

    Numra N.S

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    Firstly the stored food is being used up ,so obvioulsy when something is getting usedup the thing it was held in becomes lighter,int his case it is the seed .when the mass goes up after a while is because they use the food stored to release energy and put together amino acids to make a protein ,which can be cells ,as this means its growing, therefore its weight goes up !
     
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