Advertisements
Advertisements
प्रश्न
Answer the following question.
How does suitable pollination lead to fertilization?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Put a tick mark (✓) against the correct alternative in the following statement
Reproductive whorls of a flower are:
In the figure, the parts marked A, B and C are sequentially:
(A) Plumule, Radicle and Cotyledon
(B) Radicle, Plumule and Cotyledon
(C) Plumule, Cotyledon and Radicle
(D) Radicle, Cotyledon and Plumule
Which of the following is not an unisexual flower?
a) Coconut
b) Papaya
c) Gulmohor
d) Maize
Find an odd one out.
Define.
Inflorescence
Give scientific reason.
Fertilization in plants is called double fertilization.
Match the following
| 1. | Petal | Opuntia |
| 2. | Fern | Chrysanthemum |
| 3. | Phylloclade | Attracts insect |
| 4. | Hooks | Spore |
| 5. | Sucker | Bignonia |
Which among the following statements are true for unisexual flowers?
- They possess both stamen and pistil
- They possess either stamen or pistil
- They exhibit cross pollination
- Unisexual flowers possessing only stamens cannot produce fruits
Sketch and label the essential and accessory whorls of flower.
In male reproductive whorl of a flower the archesporial cells are formed by ______.
