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प्रश्न
What is meant by emasculation?
उत्तर
Emasculation is the removal of stamens, mainly the anthers from the flower buds before their dehiscence. This is mainly done to avoid self-pollination. Emasculation is one of the measures in the artificial hybridization.
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संबंधित प्रश्न
Describe the characteristic features of wind pollinated flowers.
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 ?
Add a note on pollination mechanism in Salvia.
Which one of the following is one of the characteristics of self-pollinated flowers?
Fill in the blanks with suitable words.
Different timings for the maturation of gynoecium and androecium is called ________.
What is a flower? Draw a typical flower and label its different parts.
Describe the Advantages and Disadvantages of self-pollination to the Plant.
What are the adaptations which are required in self-pollinated plants?
The question has four options. Choose the correct answer:
Pollination by insect is known as
Very short answer type question:
What is hydrophily?
Mention various adaptations for wind pollination.
Explain water pollination in detail with its types.
Wind pollination is common in ______.
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
Plants with ovaries having only one or a few ovules are generally pollinated by ______.
Which of the following plant contain unisexual flower?
In the dioecious aquatic plant shown, identify the characteristics of the male flowers that reach the female flowers for pollination:
| Size of the flower | Colour of flower | The characteristic feature of pollen grain | |
| A | small | brightly coloured | Lightweight and non-sticky |
| B | large | colourless | large and sticky |
| C | small | white | small, covered with mucilage |
| D | large | colourless | non-sticky |
The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is ______
Mention any one example of the hydrophilous flower.
Name the pollinating agent of a flowering plant with large and coloured flowers with sticky stigma. State one characteristic feature of the pollen grains produced in such flowers.
