Biology MCQs

31. Photoreceptors in the eye called rods are important for __
[A] Night vision and central vision
[B] Colour vision and peripheral vision
[C] Night vision and peripheral vision
[D] Colour vision and central vision

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32. The human alimentary canal runs from the mouth to the anus and is approximately how many meters long?
[A] 4 m
[B] 15 m
[C] 9 m
[D] 1 m

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33. Which of the following is not pure endocrine gland?
[A] Thyroid gland
[B] Thymus gland
[C] Pancreas
[D] Adrenal

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34. A hormone, which is released by the posterior pituitary:
[A] Oxytocin
[B] TSH
[C] ICSH
[D] Prolactin

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35. Which of the following is the place of development of the embryo?
[A] Uterus
[B] Fallopian tubes
[C] A pair of ovaries
[D] Vagina

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36. A condition in which one or both of the testes fail to descend from the abdomen into the scrotum called __
[A] Vasectomy
[B] Phimosis
[C] Cryptorchidism
[D] None of these

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37. The population of the vagina with semen during coitus is called __.
[A] Insemination
[B] Outsemination
[C] Copulation
[D] Fertilization

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38. What is the causative agent of chickenpox?
[A] Rubella
[B] Yersinia pestis
[C] Varicella-zoster virus
[D] None of these

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39. Which of the following is the best fertilizer for paddy?
[A] Azolla pinnata
[B] Bacillus megatherium
[C] Rhizobium meliloti
[D] Bacillus polymyxa

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40. What is Bt cotton?
[A] cloned plant
[B] transgenic plant
[C] hybrid plant
[D] mutated plant

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