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प्रश्न
Autogamy can occur in a chasmogamous flower if ______.
विकल्प
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.
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उत्तर
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
संबंधित प्रश्न
Make a list of any three outbreeding devices that flowering plants have developed and explain how they help to encourage cross-pollination.
Why angiosperm anthers are called dithecous?
Mention two strategies that evolved to prevent self-pollination in flowers.
Describe the structure of its microsporangium.
Write two ways in which pollination may occur in plants.
Define the term Pollinating.
Compare the characteristic features of insect pollinated and wind pollinated flowers. Explain how the respective features assist in pollination.
Can a plant flowering in Mumbai be pollinated by pollen grains of the same species growing in New Delhi? Provide explanations to your answer.
Put a tick mark (✓) against the correct alternative in the following statements
Vegetative propagation is not observed in:
Differentiate Between Cross Pollination and Self Pollination:
The question has four options. Choose the correct answer:
Pollination by insect is known as
Explain water pollination in detail with its types.
For which of the following attractants and rewards are required?
Autogamy can occur in a chasmogamous flower if ______.
Chief pollinators of agricultural crops are ______.
Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in ______.
Insect pollinated flowers 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 |
Pollination refers to the ______.
Which one of the following may require pollinators, but is genetically similar to autogamy?
Advantage of cleistogamy is:
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 ______
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
Describe any three adaptations in anemophilous flowers.
Consider the following statements depicting adaptation of flowers to carryout successful pollination.
- Stigma is long, sticky and unwettable.
- Sepals, petals or perianth (if present) have waxy coating.
- Stamens with long filament and versatile anthers.
- Tubular corolla is seen.
- Flowers are noctumal.
Which of the above statements clearly depict hydrophily?
What is epihydrophily?
Name the following:
One plant each of Hypohydrophily and epihydrophily.
Briefly discuss any two methods by which plants avoid self-pollination.
Comparatively a large amount of pollen grains are wasted during ______.
