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(i) Draw a diagram showing germination o...

(i) Draw a diagram showing germination of pollen on stigma of a flower.
(ii) Label pollen grain, male germ cells, pollen tube and female germ cell in the above diagram.
(iii) Define fertilization in plants.

Text Solution

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The fusion of male and female gametes of all sexually-reproducing organisms is called fertilization.
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Distinguish between unisexual and bisexual flowers giving one example of each. Draw a neat diagram showing fertilisation in a flower and label: a] Pollen tube b] Male germ cell c] Female germ cell, on it. OR Draw the diagram showing the germination of pollen on stigma and label the part on which pollination takes place. Answer the following questions based on diagram given aside. i] Name the part marked 'P. in the diagram. ii] How does 'P. reach part 'B'? iii] State the importance of the part 'C'. iv] What happens to the part marked 'D' after fertilisation is over? Mention the role of gamete and zygote in sexually reproducing organisms.

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