Advertisements
Advertisements
प्रश्न
Give reason for the following:
Fertilization cannot take place in flowers if pollination does not occur.
Why cannot fertilization take place in flowers if pollination does not occur?
उत्तर
In flowering plants, male gametes are produced in the pollen grains inside the anther. Pollination brings the pollen grains having male gametes from the anther to the stigma. Upon successful arrival of pollen grains on the stigma, a pollen tube is formed where they take male gamete to the female gamete or egg present in the ovule for fertilisation. So, if pollination does not occur, fertilisation will also not take place.
APPEARS IN
संबंधित प्रश्न
(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?
Explain what you understand by sexual reproduction.
The reproductive part of a plant is the ______.
The process of fusion of the male and female gametes is called ______.
What is meant by 'unisexual flowers' and 'bisexual flowers'? Give two examples of each.
Which of the following statements are true for sexual reproduction in flowering plants?
(i) it requires two types of gametes
(ii) fertilisation is a compulsory event
(iii) it always results in the formation of zygote
(iv) offsprings formed are clones
(a) (i) and (iv)
(b) (i), (ii) and (iv)
(c) (i), (ii) and (iii)
(d) (ii), (iii) and (iv)
What is pollination? Mention its types.
What does germination mean?
Conidia are formed endogenously while zoospores are formed endogenously.
Length of pollen tube depends on the distance between ______
