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प्रश्न
What is the bagging technique?
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उत्तर
Various artificial hybridization techniques (under various crop improvement programmes) involve the removal of the anther from bisexual flowers without affecting the female reproductive part (pistil) through the process of emasculation. Then, these emasculated flowers are wrapped in bags to prevent pollination by unwanted pollen grains. This process is called bagging.
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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.
Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.
A flower of tomato plant following the process of sexual reproduction produces 200 viable seeds.
Answer the following questions giving reasons :
(a) What would have been the minimum number of ovules present in pre-pollinated pistil ?
(b) How many microscope mother cells would minimally be required to produce requisite number of pollen grains ?
(c) How many pollen grains must have minimally pollinated the carple ?
(d) How many male gametes would have used to produce these 200 viable seeds ?
(e) How many megaspore mother cells were required in this process ?
Why angiosperm anthers are called dithecous?
Enlist advantages and disadvantages of cross pollination
Write two ways in which pollination may occur in plants.
Fill in the blank:
Male sex cells in plants are called _________.
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_______ .
Give one word/term for the following:
Pollination of flowers by birds.
Type of interaction where an individual sacrifices its own welfare (life) for the benefit of another animal of its own species is ______.
Differentiate between geitonogamy and xenogamy (allogamy).
What are the adaptations which are required in cross-pollinated
What are the adaptations which are required in self-pollinated plants?
What are the different adaptations shown by bird-pollinated flowers?
Explain water pollination in detail with its types.
Wind pollination is common in ______.
Anemophily type of pollination is found in ______.
Feathery stigma occurs in ______.
Plants with ovaries having only one or a few ovules are generally pollinated by ______.
In some plants anther and stigma mature at the same time this condition is called ______.
Which type of flower has ovary superior?
Autogamy can occur in a chasmogamous flower if ______.
Mention any one example of the anemophilous flower.
Mention any one example of the hydrophilous flower.
Give any four floral adaptations for chiropterophily.
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.
