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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.
संबंधित प्रश्न
As a senior biology student you have been asked to demonstrate to the students of secondary level in your school, the procedure(s) that shall ensure cross-pollination in a hermaphrodite flower. List the different steps that you would suggest and provide reasons for each one of them.
Describe the characteristic features of wind pollinated flowers.
What are chasmogamous flowers?
Mention two strategies that evolved to prevent self-pollination in flowers.
Differentiate between the following:
Self pollination and cross pollination.
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.
Answer the following question.
Express the process of pollination in Vallisneria.
Answer the following question.
Write the difference in the characteristics of the progeny produced as a result of the two processes.
What is a flower? Draw a typical flower and label its different parts.
Give an account of various abiotic agencies used in pollination along with their adaptations for pollination.
For which of the following attractants and rewards are required?
A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by ______.
Both chasmogamous and cleistogamous flowers are present in ______.
Feathery stigma occurs in ______.
Which one of these statements is incorrect?
The following statements seem to describe the water-pollinated submerged plants.
Describe any three adaptations in anemophilous flowers.
Mention any one example of the anemophilous flower.
Give any four floral adaptations for chiropterophily.
Name the pollinating agent of a flowering plant with large and coloured flowers with sticky stigma. State one characteristic feature of the pollen grains produced in such flowers.
