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प्रश्न
Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
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उत्तर
Cross-pollination cannot occur in cleistogamous flowers. Cleistogamous flowers do not open at all. In these flowers, the anthers and stigma are close together; when the anthers dehisce in the flower buds, pollen grains touch the stigma, resulting in pollination. As a result, these flowers are always self-pollinated since they remain closed, and cross pollen cannot land on the stigma. Cleistogamous flowers can pollinate and set seeds without pollinators.
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संबंधित प्रश्न
Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.
Describe the characteristic features of wind pollinated flowers.
What are chasmogamous flowers?
Mention two strategies that evolved to prevent self-pollination in flowers.
What is self-incompatibility?
What is meant by emasculation?
Draw a diagram of a section of a megasporangium of an angiosperm and label funiculus, Micropyle, embryosac and nuclleus.
Which one of the following is one of the characteristics of self-pollinated flowers?
Name of the part of the ovary which gives rise to:
Fruit ______
Give four adaptations shown by flowers pollinated by wind.
Name the two types of pollination.
Write different modes of pollination in detail with suitable examples.
Describe the Advantages and Disadvantages of self-pollination to the Plant.
Give an account of various abiotic agencies used in pollination along with their adaptations for pollination.
Which of the following pair has haploid structures?
Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in ______.
Triple fusion in Capsella bursa pastoris is fusion of male gamete with ______.
In some plants anther and stigma mature at the same time this condition is called ______.
During Hybridization process anther of the bisexual flower is removed before it dehisces is called ______.
Which type of flower has ovary superior?
Pollination refers to the ______.
Advantage of cleistogamy is:
Autogamy can occur in a chasmogamous flower if ______.
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
What is hypohydrophily?
What is epihydrophily?
Name the following:
Aquatic plants which are anemophilous.
Name the pollinating agent of a flowering plant with large and coloured flowers with sticky stigma. State one characteristic feature of the pollen grains produced in such flowers.
