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प्रश्न
Draw a diagram of a section of a megasporangium of an angiosperm and label funiculus, Micropyle, embryosac and nuclleus.
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उत्तर
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संबंधित प्रश्न
Describe the characteristic features of wind pollinated flowers.
Mention two strategies that evolved to prevent self-pollination in flowers.
What is self-incompatibility?
Give the floral adaptations for anemophily.
Put a tick mark (✓) against the correct alternative in the following statements
Pollen is produced in the
Insect pollinated flowers are ______.
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
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 |
Identify the set of correct statements:
- The flowers of Vallisneria are colourful and produce nectar.
- The flowers of waterlily are not pollinated by water.
- In most of water-pollinated species, the pollen grains are protected from wetting.
- Pollen grains of some hydrophytes are long and ribbon like.
- In some hydrophytes, the pollen grains are carried passively inside water.
Choose the correct answer from the options given below:
