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Evolution

Short Answer Type

91. Try to trace the components of human evolution.

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Long Answer Type

92. Briefly state the major theories of origin of life. Which one of them has scientific basis ?

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93. State the hypothesis of Oparin and Haldane about the primeval earth condition. What do you understand by Haldane’s hot, dilute soup ? State its significance.

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94.

Summarise Miller's simulation experiment for organic synthesis. Comment on its efficacy.

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95.

Using internet and discussing with your teacher, trace the evolutionary stages of any one animal say horse.

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Short Answer Type

96. What is variation ? Name the basic processes that cause variation among organisms. Discuss the role of migration in evolution.

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Long Answer Type

97.

Define genetic drift, founder effect and genetic bottleneck?

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98. What is natural selection in modern terms ? Elucidate the three different effects of natural selection on variation.

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99. Describe present day concept of evolution.

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Short Answer Type

100.
State the advantages that the erect posture and large brain gave to the humans over other primates.

As a result of erect posture, the fore-limbs became free and with the use of opposable thumb man started making and using tools. He also started writing and used hand for eating food .

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