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#2
31st July 2014, 09:07 AM
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| Re: 12th standard previous years question papers for Biology
This is the CBSE 12th standard previous years question papers for Biology: Write the types of sex-determination mechanisms the following crosses show' Give an example of each tYPe. (i) Female XX with Male XO (ii) Female ZW with MaleZZ How did the process of RNA interference help to control the nematode from infecting roots of tobacco plants ? Explain.     Remaining questions are in the attachment, download it freely from here: |
