Advertisements
Advertisements
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.
Advertisements
उत्तर
As a senior biology student, to demonstrate cross-pollination in a hermaphrodite flower, first perform emasculation by removing stamens before pollen release to prevent self-pollination. Next, bag the emasculated flower to avoid contamination from unwanted pollen. Then, collect pollen from a different plant and dust it onto the stigma of the emasculated flower. Finally, re-bag and label the flower to ensure controlled cross-pollination. This procedure prevents self-fertilisation and promotes genetic variation.
APPEARS IN
संबंधित प्रश्न
Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.
Explain the post-pollination events leading to seed production in angiosperms.
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?
Make a list of any three outbreeding devices that flowering plants have developed and explain how they help to encourage cross-pollination.
Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
State the name of the chief pollinating agent against the corresponding plant by choosing from those given in brackets.
Dahlia_______ .
When maturation time of reproductive parts in a flower is different.
In bisexual flowers, maturation of gynoecium before androecium is known as ______.
Explain water pollination in detail with its types.
Wind pollination is common in ______.
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by ______.
Triple fusion in Capsella bursa pastoris is fusion of male gamete with ______.
Heterostyly as a contrivance for cross-pollination is found in ______.
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 one of the following may require pollinators, but is genetically similar to autogamy?
Which of the following floral adapation are adapted by hydrophilous flowers?
What is hypohydrophily?
Comparatively a large amount of pollen grains are wasted during ______.
Which type of pollination involves the transfer of pollen between different plants of the same species?
