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81. How were mammals better than the other organisms?

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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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85. Differentiate apes and man.

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86. Name the biggest of the land reptiles.

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

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Characteristics of skull of Australopithecus
1. Theythey hunted with stone weapons.

2. They ate fruits and did not eat meat.

3. Long snout like that of nose.

4. Dentition resembles present day man.

5. Face is less projected.

6. Large sized brain in comparison with other animals of that period.

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

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

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