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प्रश्न
Write different modes of pollination in detail with suitable examples.
उत्तर
The two modes of pollination are:
(i) Self-pollination - It is the transfer of pollens produced within the anther of a flower to the stigma of the same flower or to the stigma of another flower of the same plant. In such flowers, pollination is ensured since the flowers bear similar genetic characters. Self-pollination can occur in bisexual or monoecious flowers. Examples of plants showing self-pollination are Mirabilis, Arachis, etc.
(ii) Cross-pollination - It is the transfer of pollen grains from the anthers of a flower of one plant to the stigma of a flower of another plant. Cross-pollination occurs in unisexual or dioecious flowers such as papaya, maize, jasmine, rose etc.
APPEARS IN
संबंधित प्रश्न
Draw a diagram of a section of a megasporangium of an angiosperm and label funiculus, Micropyle, embryosac and nuclleus.
Define the term Pollinating.
Compare the characteristic features of insect pollinated and wind pollinated flowers. Explain how the respective features assist in pollination.
State the name of the chief pollinating agent against the corresponding plant by choosing from those given in brackets.
Dahlia_______ .
Describe pollination. How many types of pollinations are found?
Pollination by water occurs in ______.
The flower which possesses both androecium and gynoecium is called perfect or ______.
Autogamy can occur in a chasmogamous flower if ______.
Describe any three adaptations in anemophilous flowers.
Briefly discuss any two methods by which plants avoid self-pollination.
