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प्रश्न
At which stage pollen grains are shed from the anther in Angiosperms?
उत्तर
At the two-celled stage, pollen grains are shed from the anther in Angiosperms.
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संबंधित प्रश्न
A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds.
Answer the following questions giving reasons :
(a) What is the minimum number of pollen grains that must have been involved in the pollination of its pistil?
(b) What would have been the minimum number of ovules present in the ovary?
(c) How many megaspore mother cells were involved?
(d) What is the minimum number of microspore mother cells involved in the above case?
(e) How many male gametes were involved in this case?
Complete the following chart and rewrite.
| Sr.No. | Agencies | type of pollination |
| 1 | Water | .................... |
| 2 | ........................... | Entomophily |
| 3 | Bat | .................... |
| 4 | ....................... | Ornithophily |
(Or)
Explain outbreeding devices in angiospermic plants.
Very short answer type question:
What is hydrophily?
Even in absence of pollinating agents seed-setting is assured in ______.
Which type of pollination does Figure 12.1 indicate?
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
Describe any three adaptations in anemophilous flowers.
Mention any one example of the anemophilous flower.
Describe any three adaptations in hydrophilous flowers.
What is epihydrophily?
