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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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Characteristics of coacervates

1. Molecular aggregates.

2. Bounded by a membrane.

3. Grow by absorbing materials.

4. They divide by budding.

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38. Which island did Alfred Wallace work on??

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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.

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