Biology 12th Class Question Bank : part 2

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                                         Sheet - 2 



  1. Write about the four phases in  menstrual cycle and also explain the hormonal control of  this period .
  2. Write the four way to transfer pollen grain on stigma ?
  3. Explain industrial melanism .
  4.  Explain Mendel law of independent assortment .
  5.  Write the difference between GIFT & ZIFT .
  6.  Write the full form of ART .
  7.  Explain Post fertilisation event .
  8.  Explain law of co dominance .
  9.  Explain down syndrome .
  10.  Describe Griffith Experiment .
  11.  Explain the process of PCR .
  12.  Explain HIV process in detail.
  13.  What do you mean by Air pollution ? write the causes of air pollution .
  14.  Why CNG is better than diesel ?
  15.  What is green house effect ?    


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