Biology MCQs

11. In how many parts is the human brain divided?
[A] 2
[B] 4
[C] 3
[D] 5

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12. The messages received by and transmitted from the brain to the various parts of the body take the form of which of the following impulses? (UPSC Prelims 1983)
[A] Nervous impulses
[B] Chemical impulses
[C] Mechanical impulses
[D] Automatic impulses

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13. Which of the following is the thermoregulatory centre of the man body? (UPSC Prelims 1991)
[A] Pituitary
[B] Skin
[C] Hypothalamus
[D] Thyroid

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14. Which one of the following is not an essential micronutrient for plants? (UPSC Prelims 1996)
[A] Boron
[B] Zinc
[C] Sodium
[D] Copper

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15. Epiphytes are plants which depend on other plants for? (UPSC Prelims 2001)
[A] food
[B] mechanical support
[C] shade
[D] water

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16. Which of the following features of DNA makes in uniquely suited to store and transmit genetic information from generation to generation? (UPSC Prelims 2001)
[A] Complementarity of the two stands
[B] Double helix
[C] Number of base-pairs per turn
[D] Sugar-phosphate backbone

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17. Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species? (UPSC Prelims 2002)
[A] Isolation
[B] Mutation
[C] Natural Selection
[D] Sexual Reproduction

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18. Which of the following is studied in Ethnobotany?
[A] Practical use of plants by local culture and people
[B] Relations between Plants and peoples Behvaior
[C] Comparison of different plants in a particular area
[D] Study of relations of plants, animals and animals in an area

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19. Which of the following branch of biology deals with the study of Cartilage?
[A] Chondrology
[B] Chromatology
[C] Cnidology
[D] Conchology

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20. Who discovered cell differentiation?
[A] Walther Flemming
[B] Edwin John Butler
[C] Karl Ernst von Baer
[D] Parthasarthy Iyengar

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