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प्रश्न
Answer the following question.
How does suitable pollination lead to fertilization?
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उत्तर
As the pollen of the right type is deposited on to the stigma of the flower of the same species, quite often it leads to germination of pollen grain as a result of a chemical cross-talk between the pollen and the carpel. Germination leads to the growth and extension of the pollen tube through the style of the flower to its ovary. The pollen tube carries the male gametes all the way to the ovule inside the ovary, leading to fertilization of male gamete with the female gamete inside the ovule.
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संबंधित प्रश्न
How does fertilisation occur in flowers? Name the parts of the flower that develop into (i) seed, and (ii) fruit after fertilisation.
(i) Name the part marked 'A' in the diagram.
(ii) How dose 'A' reachese part 'B'?
(iii) State the importance of the part 'C'.
(iv) What happens to the part marked 'D' after fertilisation is over?
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the female gamete?
In what ways is fertilisation in a plant similar to fertilisation in a human?
Fill in the blank by selecting suitable word:
A flower that bears both the male and the female parts is known as __________ flower.
(a) Identify A, B and C in the given diagram and write their functions.
(b) Mention the role of gamete and zygote in sexually reproducing organisms.
List any two differences between pollination and fertilization.
Write the functions of sepals
Which among the following statements are true for sexual reproduction in flowering plants?
- It requires two types of gametes
- Fertilisation is a compulsory event
- It always results in formation of zygote
- Offspring formed are clones
Give any two examples of agents of pollination.
