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प्रश्न
Differentiate between self-pollination and cross-pollination.
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उत्तर
Self-pollination: This occurs when pollen grains from a flower’s stamens land on the stigma of the same flow.
Cross-pollination: Cross pollination occurs when pollen grains from one flower’s stamens land on the stigma of another blossom.
संबंधित प्रश्न
Where is the male gamete formed in flowering plants?
The length of pollen tube depends on the distance between :
(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style
The part of a seed which grows and develops into root on germination is :
(a) cotyledon
(b) plumule
(c) follicle
(d) radicle
The flask-shaped organ A at the centre of a flower is surrounded by a number of little stalks B having swollen tops which lie just inside the ring of petals.
(a) Name A. What are the various parts of A?
(b) Which part of A contains gametes?
(c) Name B. What is the swollen top of B known as?
(d) What does the swollen top of b contain?
(e) Out of A and B, which one is (i) male part, and (ii) female part of the flower?
Multiple choice question. Tick (✓) the correct choice:
The male gamete is present inside the which germinates.
- the style
- the stigma
- the anther
- the ovary
(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.
The anther wall consists of four wall layers where ______
Identify the female gametophyte in angiosperms.
The process of release of eggs from the ovary is called ______
Which out of the following processes does not lead to the formation of clones.
