Advertisements
Advertisements
Question
Autogamy can occur in a chasmogamous flower if ______.
Options
Pollen matures before maturity of ovule
Ovules mature before maturity of pollen
Both pollen and ovules mature simultaneously
Both anther and stigma are of equal lengths.
Advertisements
Solution
Autogamy can occur in a chasmogamous flower if both pollen and ovules mature simultaneously.
Explanation:
Autogamy in chasmogamous flowers occurs when pollen and ovules mature at the same time, allowing pollen to fertilize ovules within the same flower. Without simultaneous maturity, self-pollination is unlikely in open flowers like chasmogamous ones.
APPEARS IN
RELATED QUESTIONS
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.
Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.
Name the part of the flower which the tassels of the corn- cob represent.
What are chasmogamous flowers?
Why does self-pollination not lead to seed formation in self-incompatible species?
Add a note on pollination mechanism in Salvia.
Give the floral adaptations for anemophily.
Name two characteristics of flowers in which pollination occur by wind.
Differentiate between the following:
Self pollination and cross pollination.
Compare the characteristic features of insect pollinated and wind pollinated flowers. Explain how the respective features assist in pollination.
Name of the part of the ovary which gives rise to:
Fruit ______
Name of the parts of the ovary which give rise to:
Fruit wall ______
Describe the advantages and disadvantages of cross-pollination to the plant.
Give four adaptations shown by flowers pollinated by wind.
Differentiate between geitonogamy and xenogamy (allogamy).
Put a tick mark (✓) against the correct alternative in the following statements
Pollen is produced in the
Write different modes of pollination in detail with suitable examples.
What are the adaptations which are required in cross-pollinated
Explain water pollination in detail with its types.
Give an account of any two biotic agents for pollination along with their adaptations.
A dioecious flowering plant prevents both ______.
Both chasmogamous and cleistogamous flowers are present in ______.
Even in absence of pollinating agents seed-setting is assured in ______.
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 ______
What is self-incompatibility?
What is ornithophily?
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 |
Mention any one example of the hydrophilous flower.
