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Evolution

Short Answer Type

31. Attempt giving a clear definition of the term species.

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32. Why was the theories of spontaneous generation not accepted ?

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33. State the three connotations of the theory of special creation.

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34. Briefly explain theory of biogenesis.

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35. Write the composition of primitive earth’s atmosphere according to the Big Bang theory..

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36. What are coacervates ?

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37. List characteristics of coacervates.

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One Word Answers

38. Which island did Alfred Wallace work on??

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Short Answer Type

39. Why is nascent oxygen supported to be toxic to aerobic life forms?

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40. Write the contribution of Urey and Miller.

Urey and Miller conducted experiment which supported that life originated by chemosynthesis. The chemosynthetic theory (Oparin-Haldane) states that life originated from non-living matter is based on the presence of methane and ammonia in the atmosphere. It required a high temperature, high energy radiations and electric discharges.

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