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प्रश्न
Choose the correct statement from the following:
पर्याय
Cleistogamous flowers always exhibit autogamy.
Chasmogamous flowers always exhibit geitonogamy.
Cleistogamous flowers exhibit both autogamy and geitonogamy.
Chasmogamous flowers never exhibit autogamy.
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उत्तर
Cleistogamous flowers always exhibit autogamy.
Explanation:
Cleistogamous flowers never open, so pollen from other plants cannot reach their stigma. This means they are always pollinated by their pollen, ensuring self-pollination (autogamy). This mechanism does not rely on external pollinating agents, making autogamy guaranteed in cleistogamous flowers.
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संबंधित प्रश्न
With the help of a suitable example, explain protandry.
Explain the post-pollination events leading to seed production in angiosperms.
A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds.
Answer the following questions giving reasons :
(a) What is the minimum number of pollen grains that must have been involved in the pollination of its pistil?
(b) What would have been the minimum number of ovules present in the ovary?
(c) How many megaspore mother cells were involved?
(d) What is the minimum number of microspore mother cells involved in the above case?
(e) How many male gametes were involved in this case?
Why angiosperm anthers are called dithecous?
What are chasmogamous flowers?
What is meant by emasculation?
Exine and intine are the parts of
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 ________.
Name the two types of pollination.
What are the adaptations which are required in cross-pollinated
What are the adaptations which are required in self-pollinated plants?
Mention various adaptations for wind pollination.
What are the different adaptations shown by bird-pollinated flowers?
Pollination occurs in ______.
Anemophily type of pollination is found in ______.
Even in absence of pollinating agents seed-setting is assured in ______.
Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in ______.
Which of the following is not a water pollinated plant?
Heterostyly as a contrivance for cross-pollination is found in ______.
In some plants anther and stigma mature at the same time this condition is called ______.
Which type of flower has ovary superior?
A botanist studying Viola (common pansy) noticed that one of the two flower types withered and developed no further due to some unfavorable condition, but the other flower type on the same plant survived and it resulted in an assured seed set. Which of the following will be correct?
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 |
Which of the following floral adapation are adapted by hydrophilous flowers?
Mention any one example of the anemophilous flower.
Name the following:
Aquatic plants which are anemophilous.
