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प्रश्न
What is meant by emasculation?
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उत्तर
Emasculation is the removal of stamens, mainly the anthers, from the flower buds before their dehiscence. The removal is mainly done to avoid self-pollination. Emasculation is one of the measures in the artificial hybridization.
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संबंधित प्रश्न
Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.
Explain the post-pollination events leading to seed production in angiosperms.
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 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 ?
Enlist advantages and disadvantages of cross pollination
Add a note on pollination mechanism in Salvia.
Fill in the blank:
Male sex cells in plants are called _________.
Fill in the blanks:
The two kinds of pollination are __________ and __________.
Complete the following chart and rewrite.
| Sr.No. | Agencies | type of pollination |
| 1 | Water | .................... |
| 2 | ........................... | Entomophily |
| 3 | Bat | .................... |
| 4 | ....................... | Ornithophily |
(Or)
Explain outbreeding devices in angiospermic plants.
State the name of the chief pollinating agent against the corresponding plant by choosing from those given in brackets.
Dahlia_______ .
Fill in the blanks with suitable words.
Different timings for the maturation of gynoecium and androecium is called ________.
Give one word/term for the following:
Pollination of flowers by birds.
Describe the advantages and disadvantages of cross-pollination to the plant.
Put a tick mark (✓) against the correct alternative in the following statements
Vegetative propagation is not observed in:
What are the different adaptations shown by bird-pollinated flowers?
Give an account of any two biotic agents for pollination along with their adaptations.
Which of the following pair has haploid structures?
Chief pollinators of agricultural crops are ______.
Anemophily type of pollination is found in ______.
Feathery stigma occurs in ______.
The flower which possesses both androecium and gynoecium is called perfect or ______.
Which of the following plant contain unisexual flower?
Which type of flower has ovary superior?
The flower which does not open at all are called ______.
In which one of the following pollination is autogamous?
What is ornithophily?
Which of the following floral adapation are adapted by hydrophilous flowers?
Mention any one example of the hydrophilous flower.
What is hypohydrophily?
Which one of the following flower is hypohydrophilous?
