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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.
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.
Describe the characteristic features of wind pollinated flowers.
List the different types of pollination depending upon the source of pollen gain.
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.
The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as ______.
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:
When stigma and anthers do not grow up to the same height, which favors only cross-pollination.
Give one word/term for the following:
Pollination of flowers by insects.
Mention any two contrivances in flowers which favour cross-pollination.
In bisexual flowers, maturation of gynoecium before androecium is known as ______.
Coelacanth was caught in South Africa. State the significance of the discovery of Coelacanth in the evolutionary history of vertebrates.
What is a flower? Draw a typical flower and label its different parts.
Mention various adaptations for wind pollination.
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 ______.
Cleistogamous flowers are ______.
Chief pollinators of agricultural crops are ______.
Feathery stigma occurs in ______.
Triple fusion in Capsella bursa pastoris is fusion of male gamete with ______.
Which of the following plant contain unisexual flower?
Which type of flower has ovary superior?
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?
In which one of the following pollination is autogamous?
Correct definition of pollination is ______
Match the Column I with Column II.
| Column I | Column II |
| A. Pea | (i) Xenogamy |
| B. Jawar | (ii) Epihydrophily |
| C. Maize | (iii) Anemophily |
| D. Vallis | (iv) Bisexual |
| E. Cannabis | (v) Geitonogamy |
Describe any three adaptations in hydrophilous flowers.
What is hypohydrophily?
In sea grass, pollens are long, ribbon like and without exine exhibiting ______ pollination.
