Q5 of 57 Page 75

Define fertilization.

After the process of pollination, a male gamete is transferred to the stigma of the flower. After the transfer, pollen tube is formed which carries the male gamete to the female gamete. Then male and female gametes get fused to form a fertilized egg known as a zygote. This process of fusion is known as fertilization.


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3

Arrange the following events of sexual reproduction in plants in the correct sequential Order:

seed formation, pollination, dispersal of seeds, fertilization.


 4

Define pollination.

 6

Name the agents of pollination in the following cases:

i) Bright coloured flowers with scent and nectar glands.


ii) No color / scent/ nectar but pollen grains are dry, light weight and powdery. Stigma is feathery.


Also mention the plants in cases (i) & (ii).


 7

Name the events (i) & (ii) and mention the nature of the nuclear structures formed at the end in the following cases:

(i) male gamete (n) + egg (n) = Zygote (2n)


(ii) male gamete (n) + secondary nucleus (2n) = Endosperm nucleus (3n).