Advertisements
Advertisements
Question
Answer the following question.
Express the process of pollination in Vallisneria.
Advertisements
Solution
Vallisneria grows in freshwater and is pollinated by water. It is a type of pollination known as hydrophily. The female flowers reach the surface of the water by a long stalk while the pollen grains are released on the surface of the water. These are passively carried by water currents to reach the stigma of the female flowers. Pollen grains of such plants are covered by mucilage which protects them from wetting.
APPEARS IN
RELATED QUESTIONS
Describe the characteristic features of wind pollinated flowers.
Name the part of the flower which the tassels of the corn- cob represent.
What is the bagging technique?
Can a plant flowering in Mumbai be pollinated by pollen grains of the same species growing in New Delhi? Provide explanations to your answer.
Very short answer type question:
What is hydrophily?
Chief pollinators of agricultural crops are ______.
In the dioecious aquatic plant shown, identify the characteristics of the male flowers that reach the female flowers for pollination:
| Size of the flower | Colour of flower | The characteristic feature of pollen grain | |
| A | small | brightly coloured | Lightweight and non-sticky |
| B | large | colourless | large and sticky |
| C | small | white | small, covered with mucilage |
| D | large | colourless | non-sticky |
The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is ______
Autogamy can occur in a chasmogamous flower if ______.
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 |
