31. The length of the spinal cord is about
A. 60 cm B. 45 cm
C. 90 cm D. 10 cm
Answer:(b )
32. Rabies is transmitted by
A. bugs B. flies
C. infected mad dogs D. mosquitoes
Answer:(c )
33. The excretory organ of the earthworm is
A. ureter B. kidney
C. nephron D. nephridium
Answer:( d)
34. The upper heart chambers are called
A. atria B. aorta
C. artery D. ventricles
Answer:( a)
35. Bees are particularly sensitive to
A. red colour B. ultraviolet light
C. green colour D. no colour
Answer:(b )
36. AIDS is caused by
A. bacteria B. protozoa
C. virus D. helminth
Answer:( c)
37. The rearing of silkworm is known as
A. apiculture B. sericulture
C. horticulture D. pisciculture
Answer:(b )
38. —— are the blood vessels which carry blood towards the heart.
A. veins B. arteries
C. capillaries D. none of these
Answer:(a )
39. Which vitamin is destroyed by cooking?
A. Vitamin A B. Vitamin C
C. Vitamin D D. Vitamin E
Answer:(b )
40. To which group Dolphins belong?
A. mammals B. fishes
C. turtles D. amphibians
Answer:(a )
41. Dengue fever is spread by
A. dogs B.
rats
C. Aedes aegypti D. anopheles
mosquito
Answer:( c)
42. The tusks of an elephant are modified?
A. molars B. pre molars
C. incisors D. canines
Answer:(c )
43. The fungal derivative used in the treatment of tuberculosis is
A. anacin B. aspirin
C. streptomycin D. tetracycline
Answer:(c )
44. ——— pairs of spinal nerves are present in the human body
A. 28 B. 31
C. 35 D. 42
Answer:( b)
45. Which planet is known as the Earth’s Twin?
A. Mars B. Jupiter
C. Uranus D. Venus
Answer:(d )
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