CBSE Sample Question Paper Biology : Set II
1. Name the type of chromosomes in which the centromere is near the middle and the two arms are almost equal in length.
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2. Which organs in human body produce haploid cells through the division of diploid cells?
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3. Why do we categorise asbestosis as an occupational hazard?
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4. How is acid rain formed? Mention any one of its harmful effects other than the corrosion of monuments.
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5. Excessive nutrients in the sewage flowing into the water bodies may lead to the death of fishes and other aquatic animals. Why will it happen so?
What is meant by the term ’sustainable development? Suggest any two ways to achieve it.
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6. Write the effect of sympathetic nervous system on the following: (i) Heart, (ii) Blood vessels, (Hi) Bronchi, (iv) Eyes, (v) Gastric secretion, and (vi) Urinary bladder.
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7. Define transpiration. How does transpiration help in upward movement of water from roots to leaves? Draw a diagram of the part of the leaf from which trans¬piration takes place.
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8. Why is blood circulation in human heart called double circulation? Explain briefly. How is ‘Pace maker’ helpful to a heart patient?
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9. Differentiate between breathing and respiration. Explain clearly how the air is inhaled and exhaled during breathing in humans.
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10. What are the two vital functions of the human kidney? Draw labelled diagram of human urinary system. Name the procedure used in the working of an artificial kidney.
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