Solve 2012 CBSE : Biology Question Paper (Set-3) given here.
1. How is it possible in Oxalis and Viola plants to produce assured seed-sets even in the absence of pollinators?
6. Why is the South Indians sugarcane preferred by agriculturalists ?
9. Draw a labeled schematic diagram of a transcription unit?
11. Describe the role of lymph nodes in providing immunity.
17. Why are small birds like humming birds not found in polar regions? Explain.
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