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प्रश्न
Give one word/term for the following:
When stigma and anthers do not grow up to the same height, which favors only cross-pollination.
उत्तर
Heterostyly
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संबंधित प्रश्न
With the help of a suitable example, explain protandry.
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?
Why does self-pollination not lead to seed formation in self-incompatible species?
Draw a diagram of a section of a megasporangium of an angiosperm and label funiculus, Micropyle, embryosac and nuclleus.
Mention any two contrivances in flowers which favour cross-pollination.
(iii) Synergids
(iv) Micropyle
Both chasmogamous and cleistogamous flowers are present in ______.
Triple fusion in Capsella bursa pastoris is fusion of male gamete with ______.
Describe any three adaptations in anemophilous flowers.
Match the Column I with Column II.
| Column I | Column II |
| A. Pea | (i) Xenogamy |
| B. Jawar | (ii) Epihydrophily |
| C. Maize | (iii) Anemophily |
| D. Vallis | (iv) Bisexual |
| E. Cannabis | (v) Geitonogamy |
