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Evolution

Short Answer Type

51. Define connecting link (in regard to evolution) and give its one example from vertebrates.

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52. What is the significance of connecting links ?

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53. What are fossils ?

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54. What is radioactive -dating? State the principle behind the procedure.

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55. What does natural selection lead to ?

Natural selection can lead to-
i. Stabilisation- in which more and more individuals aquire the mean character value.
ii. Directional change - in which more and more individuals aquire character other than the mean character.
iii. Disruption in which more and more individuals aquire peripheral character value at both the ends of distribution.

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