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प्रश्न
Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.
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उत्तर
Geitonogamy is a kind of pollination in which the pollen grains are transferred from the anther of a flower to the stigma of another flower on the same plant.
Geitonogamous flowering plants are genetically autogamous as the gametes come from the same parent plant, but since the pollen grains are being transferred to a different flower which needs a pollinating agent, it is functionally an example of cross pollination.
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संबंधित प्रश्न
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?
Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
Very short answer type question:
What is hydrophily?
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
Which of the following pair has haploid structures?
Heterostyly as a contrivance for cross-pollination is found in ______.
Which one of the following flower is hypohydrophilous?
Which of the following is classified as biotic agents of pollination?
Autogamy refers to which type of pollination process?
