Explain the biological and economic importance of fruits.  

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 Multiple Choice QuestionsLong Answer Type

61.

Give a labelled diagram  showing

A. Enlarged view of an egg apparatus showing entry of pollen tube into a synergid.
B. Discharge of male gametes into a synergid and the movements of the sperms, one into the egg and the other into the central cell
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 Multiple Choice QuestionsShort Answer Type

62. Why is endosperm in angiospermic ovule considered as more efficient ?
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63.  What are main functions of fruits ?
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64. Explain the biological and economic importance of fruits.

 


Biological importance of fruits

1. The fruit protects seeds against hostile climate conditions and animals.

2. It aids in dispersal of seeds to distant places through wind, water and animals.

Economic importance of fruits.

1. Fruits are eaten as food by man and other animals.

2. They are source of sugars, pectin, organic acids, vitamins and minerals.

3. Food grains of wheat, rice, maize constitute a staple food as cereals.

 

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65. What is fate of following in a mature fruits ?
(a) Integument (b) Ovary wall (c) Egg cell (d) Secondary nucleus (e) Antipodal cells.
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 Multiple Choice QuestionsLong Answer Type

66. Differentiate

(a) hypocotyl and epicotyl

(b) Coleoptile and coleorhiza

(c) Integument and testa

(d) Perisperm and pericarp.

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 Multiple Choice QuestionsShort Answer Type

67. Why is apple called a false fruit ? Which part of flower form its fruit ?
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68. If one can induce parthenocarpy, through the application of growth substances, which fruits you would select to induce parthenocarpy and why ?
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69.  Explain the role of tapetum in the pollen grain wall formation.
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70. What is apomixis ? Write its importance.
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