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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.
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 ?
Mention two strategies that evolved to prevent self-pollination in flowers.
What is meant by emasculation?
Enlist advantages and disadvantages of cross pollination
Fill in the blank:
Male sex cells in plants are called _________.
Find the odd-one out, giving reason:
Ovary, style, pollen grain, stigma
State the name of the chief pollinating agent against the corresponding plant by choosing from those given in brackets.
Dahlia_______ .
Differentiate between geitonogamy and xenogamy (allogamy).
Put a tick mark (✓) against the correct alternative in the following statements
Vegetative propagation is not observed in:
Describe pollination. How many types of pollinations are found?
What are the different adaptations shown by bird-pollinated flowers?
For which of the following attractants and rewards are required?
Choose the correct statement from the following.
Cleistogamous flowers are ______.
Pollination by water occurs in ______.
Which of the following pair has haploid structures?
Chief pollinators of agricultural crops are ______.
Triple fusion in Capsella bursa pastoris is fusion of male gamete with ______.
The flower which possesses both androecium and gynoecium is called perfect or ______.
Which one of these statements is incorrect?
The following statements seem to describe the water-pollinated submerged plants.
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?
Correct definition of pollination is ______
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
What is self-incompatibility?
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 |
Pollination in water lilies is carried out by ______.
Give any four floral adaptations for chiropterophily.
