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(Download) CBSE: Class XII Biology Question Paper - 2011 - (Set-3)
Class – XII (Year 2011)
Subject – Biology - (Set- 3)
All Questions are compulsory.
Wherever necessary, the diagrams drawn should be neat and properly labelled.
Q.1 Mention how is mutation theory of Hugo de Vries different from Darwin's theory of natural selection.
Q.2 Why are some organisms called as eurythermals and some others as stenohaline ?