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प्रश्न
Why do moss plants produce very large number of male gametes? Provide one reason. What are these gametes called?
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उत्तर १
Moss plants produce a large number of male gametes to increase the chances of fertilisation, as the eggs are located in the archegonium and the male gametes have to swim in water to reach the eggs for fertilisation to occur. The male gametes are called antherozoids.
उत्तर २
Moss plants produce a very large number of male gametes because the male gametes need to move through a moist environment to reach the egg for fertilization. Many male gametes fail to reach the egg, so producing them in large numbers compensates for this loss. These male gametes are called antherozoids.
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संबंधित प्रश्न
Explain the post-pollination events leading to seed production in angiosperms.
List the different types of pollination depending upon the source of pollen gain.
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Draw a diagram of a section of a megasporangium of an angiosperm and label funiculus, Micropyle, embryosac and nuclleus.
Find the odd-one out, giving reason:
Ovary, style, pollen grain, stigma
State four features of flowers pollinated by insects.
At which stage pollen grains are shed from the anther in Angiosperms?
Give an account of any two biotic agents for pollination along with their adaptations.
Which of the following pair has haploid structures?
Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in ______.
Feathery stigma occurs in ______.
Which of these is a condition that makes flowers invariably autogamous?
Which type of flower has ovary superior?
Advantage of cleistogamy is:
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
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 |
