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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
With the help of a suitable example, explain protandry.
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?
Write two ways in which pollination may occur in plants.
Define the term Pollinating.
Name of the parts of the ovary which give rise to:
Fruit wall ______
Give one word/term for the following:
When stigma and anthers do not grow up to the same height, which favors only cross-pollination.
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?
Mention various adaptations for wind pollination.
For which of the following attractants and rewards are required?
Choose the correct statement from the following.
Wind pollination is common in ______.
A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by ______.
Which of the following pair has haploid structures?
Chief pollinators of agricultural crops are ______.
Feathery stigma occurs in ______.
Which of the following is not a water pollinated plant?
Which of the following plant contain unisexual flower?
The flower which does not open at all are called ______.
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?
Which type of pollination does the figure indicate?
Describe any three adaptations in hydrophilous flowers.
Mention any one example of the hydrophilous flower.
What is hypohydrophily?
Briefly discuss any two methods by which plants avoid self-pollination.
When and why does a plant breeder employ the emasculation technique?
In sea grass, pollens are long, ribbon like and without exine exhibiting ______ pollination.
