Biology MCQs

31. The least distance of distinct vision for a young adult with normal vision is __
[A] 25 m
[B] 20 m
[C] 25 cm
[D] 20 cm

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32. How many types of joints are present in our body?
[A] 2
[B] 3
[C] 5
[D] 6

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33. How many chambers are there in the human heart?
[A] Two
[B] Three
[C] Four
[D] None of these

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34. The branch of biology that studies the immune system in all organisms.
[A] Botany
[B] Microbiology
[C] Immunology
[D] Biotechnology

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35. The corpus luteum is the source of secretion of:
[A] LH
[B] Estradiol
[C] Estrogen
[D] Progesterone

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36. Which of the following organs is majorly affected by hepatitis?
[A] liver
[B] heart
[C] kidney
[D] brain

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37. Azolla enriches rice fields with nitrogen due to its association with?
[A] Anabaena
[B] Nostoc
[C] Rhizobium
[D] Frankia

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38. Green Revolution related to which of the following?
[A] Milk
[B] Agriculture
[C] Water
[D] Animals

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39. Which metal microparticles are used in gene guns?
[A] Aurum
[B] Nitrogen
[C] Magnesium
[D] Cuprum

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40. Fat present below the skin surface in our body acts as a barrier against ____:
[A] Loss of heat from the body
[B] Loss of salt from the body
[C] Loss of essential body fluids
[D] Entry of harmful micro-organisms from the environment

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