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  1. ousamah112

    paper are getting harder with proof

    it doesnt matter much.. if you do hardwork ,ALLAH will surely give you success...
  2. ousamah112

    A2 Biology | Post your doubts here

    some organisms have small incubation period.. and also depends upon their metabolism rate..or some animals reach reproduction age early... that wht i thnk is the answer..
  3. ousamah112

    A2 Biology | Post your doubts here

    if one specie has odd numbers of chromosomes it can only be fertile if by chance all the chromosomes go into one cell while meiosis,and other cell remains empty. and yes there is probability of even chromosomes too in polyploidy
  4. ousamah112

    A2 Biology | Post your doubts here

    polyploidy is sympatric speciation. In which number of sets of chromosomes is odd and thus that specie can not make gametes and is infertile. so,it is sexually isolated
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