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Biology CBSE Live product
Class 9 (2025-26)
Improvement in food resources
Annual Revision I
5.
Crop improvement
Question:
3
m.
Respond in one or two sentences explaining the key idea:
Farmers in Punjab want wheat and rice varieties that are resistant to pests and diseases while giving high yield.
Which crop improvement strategies are suitable?
Note: Choose all possible answers.
Spraying excessive chemical pesticides only
Mutation breeding to introduce pest-resistance genes
Hybridisation of resistant and high-yielding varieties
Growing monoculture crops without improvement
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