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Evolution

Short Answer Type

81. How were mammals better than the other organisms?

Mammals were more intelligent in sensing the avoiding the dangee at least and they were viviparous that is protected their unborm young ones inside the mother's body. Thus there were more chances of their survival and they increased in number.

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82. Describe three mechanisms by which genetic variability can be produced in nature.

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83. Discuss the role of variations in evolution.

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84. The homology in haemoglobin of man and gorilla is 99 per cent. What explanation would you give for this finding ?

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Long Answer Type

85. Differentiate apes and man.

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One Word Answers

86. Name the biggest of the land reptiles.

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Short Answer Type

87. List the chronological sequence of evolution of genus Homo.

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88. Give important characteristics of the skull of Australopithecus.

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One Word Answers

89. Name the man-like primates in the evolutionary history of man which started tool making?

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Short Answer Type

90. What role fire played in the early evolutionary history of man ?

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