ICSE Worksheet for chapter-11 Improvement in Food Resources class 9

Worksheet For class 9

Find ICSE Worksheet for chapter-11 Improvement in Food Resources class 9

CLASS-9

BOARD: ICSE

BIOLOGY Worksheet - 11

TOPIC: Improvement in Food Resources

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1. Application of nitrogenous manure to a plant causes
   1. growth retardation due to toxicity of ammonia
   2. early flowering
   3. early fruiting
   4. vigorous vegetative growth
2. Living organisms are used in _____.
   1. organic manure
   2. biofertilizers
   3. natural insecticides
   4. pesticides
3. The chief cereal crop of India is
   1. wheat
   2. sorghum
   3. maize
   4. rice
4. What do we get from cereals, pulses, fruits and vegetables?
5. What are the desirable agronomic characteristics for crop improvements?
6. What are macro-nutrients and why are they called macronutrients?
7. Explain Genetic Engineering with examples.
8. Compare the use of manure and fertilizers in maintaining soil fertility.
9. What is Hybridization?
10. What is the difference between vermicomposting and green manure?