from which of this chapter(biodiversity) tthe question may come in this year exam? what is the weightage of this chapter?

According to CBSE, the weightage for the unit 'Ecology and Environment', under which the subunit biodiversity and conservation is included is 14 marks out of 70. So it constitutes 20% of the total marks. Kindly prepare it well. Read the NCERT textbook carefully, refer to the study material in the website and prepare your notes accordingly. If you have any queries, kindly get back to us. All the Best!