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61. (i) Give any two striking similarities in the structure of embryos of all the vertebrates.

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62. What according to Lamarck was the driving force for evolution? Explain with an example.

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63. What is biogeography ? How does the distribution of animals and plants support evolution ?

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64. What is adaptive radiation ?

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65. Name the various theories of evolution.

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66. List the main points of Lamarck's theory.

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Darwin's Theory of Evolution may be summed up as follows :

1. Rapid multiplication.

2. Struggle for existence.

3. Variations.

4. Natural selection or survival of the fittest.

5. Inheritance of useful variations.

6. Origin of new species.

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68. Homo sapiens arose during which age?

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69. Explain antibiotic resistance observed in light of Darwinian selection theory.

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70. Find out from newspapers and popular science articles any new fossil discoveries or controversies about evolution.

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