Pollen grains in angiosperms are not motile. They have to be carried to the stigma by external agents.
Explain how it takes place in vallisnaria.

Pollen grains if angiosperms are non-motile. So, they have to be carried to the stigma by external agents. a. Name the process of transfer of pollen grains from the anther to the stigma of flower. b. Write the name of three such agents.

Pollen grains of many plants are found to be allergic. Do they have any benefits other than the involvement in reproduction. Explain.

Read the following statements and find out the incorrect statements. a. In majority of organisms, male gamete is motile and female gamete is non-motile (stationary). b. In algae and fungi, both male and female gametes are non-motile. c. In seed plants, pollen grains are the carrier of male gametes and ovule has the egg. d. In dioecious plants, pollination facilitates transfer of pollen grains to the stigma. e. In monoecious animals, since male and female gametes are formed in different individuals, the or ganism must evolve special mechanism for gamete transfer.

Transfer of pollen grains from the anther to the stigma of a flower is called pollination. Grass plants generally have small , inconspicuous flowers while plants belonging to many angiosperm bear conspicuous coloured flowers. What are the salient features present in these two groups for effective pollination?

In angiosperm pollen tube is a fertilizing agent. Write the cellular contents carried by the pollen tube.