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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.
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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.
Name the part of the flower which the tassels of the corn- cob represent.
Enlist advantages and disadvantages of cross pollination
The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as ______.
Write two ways in which pollination may occur in plants.
Fill in the blank:
Male sex cells in plants are called _________.
State the name of the chief pollinating agent against the corresponding plant by choosing from those given in brackets.
Dahlia_______ .
Fill in the blanks with suitable words.
Different timings for the maturation of gynoecium and androecium is called ________.
Fill in the blanks with suitable words.
_______ is a water-pollinated flower.
Name of the part of the ovary which gives rise to:
Fruit ______
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.
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:
Choose the correct statement from the following.
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
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 ______.
Anemophily type of pollination is found in ______.
Both chasmogamous and cleistogamous flowers are present in ______.
Which of the following is not a water pollinated plant?
The flower which does not open at all are called ______.
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 ornithophily?
What are the major abiotic factors that influence habitat?
Briefly discuss any two methods by which plants avoid self-pollination.
Comparatively a large amount of pollen grains are wasted during ______.
