61.
Which group of organisms serves as the best indicator of pollution in a water body?

62.
In female a small portion oviduct is removed and cut end is ligated by surgical operation is called

63.
Which of the following would cause gene flow?

64.
Oral pills of birth control prevent

65.
Study of population is

66.
Surgical procedure in which a small portion of sperm duct is removed and cut end ligated in male is called

67.
Which of the following serves as a nutritive tissue for the growing embryo?

68.
In the human being, normally in which one of the following parts, does the sperm fertilize the ovum?

69.
Finger like ends of the fallopian tubes are called

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