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51. What is life span ?

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52. Write the approximate average life span of following organisms :

May fly, wheat, monkey, dog, cat, horse, elephant, eagle, man, parrot, tortoise, Banyan tree and sequoia tree. Name the oldest tree.

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53. Distinguish between asexual and sexual reproduction. Why is vegetative reproduction also considered as a type of asexual reproduction ?

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The different ways of asexual reproduction are :

(a) Fission (Binary and Multiple fissions)
(b) Budding
(c) Fragmentation
(d) Gemmulation
(e) Vegetative propagation and
(f) Sporulation.

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55. Discuss the advantages and disadvantages of asexual reproduction.

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56. What is vegetative propagation ? Give two suitable examples.

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57. Discuss the advantages and disadvantages of sexual reproduction.

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58. Describe the fission in yeast.

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59. Show the different kinds of asexual reproductive structures.

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60.

Describe fission in animals as mode of reproduction.

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