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प्रश्न
Choose the correct statement from the following:
पर्याय
Cleistogamous flowers always exhibit autogamy.
Chasmogamous flowers always exhibit geitonogamy.
Cleistogamous flowers exhibit both autogamy and geitonogamy.
Chasmogamous flowers never exhibit autogamy.
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उत्तर
Cleistogamous flowers always exhibit autogamy.
Explanation:
Cleistogamous flowers never open, so pollen from other plants cannot reach their stigma. This means they are always pollinated by their pollen, ensuring self-pollination (autogamy). This mechanism does not rely on external pollinating agents, making autogamy guaranteed in cleistogamous flowers.
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संबंधित प्रश्न
What is the bagging technique?
Enlist advantages and disadvantages of cross pollination
Name two characteristics of flowers in which pollination occur by wind.
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_______ .
Name of the parts of the ovary which give rise to:
Fruit wall ______
Give one word/term for the following:
Pollination of flowers by birds.
Put a tick mark (✓) against the correct alternative in the following statements
Vegetative propagation is not observed in:
What is a flower? Draw a typical flower and label its different parts.
Describe pollination. How many types of pollinations are found?
Differentiate Between Cross Pollination and Self Pollination:
Describe the Advantages and Disadvantages of self-pollination to the Plant.
The question has four options. Choose the correct answer:
Pollination by insect is known as
Explain water pollination in detail with its types.
Wind pollination is common in ______.
Even in absence of pollinating agents seed-setting is assured in ______.
Plants with ovaries having only one or a few ovules are generally pollinated by ______.
Which of the following is not a water pollinated plant?
Which type of pollination does the figure indicate?
In which one of the following pollination is autogamous?
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 |
What are the major abiotic factors that influence habitat?
Complete the following table:
| Sr. | Type of pollination | Agent | Kind of flower | Examples |
| (i) | ______ | Wind | ______ | Maize |
| (ii) | Chiropterophily | ______ | Dull colour, with strong fragrance, abundant nectar | Adansonia |
| (iii) | Entamophily | Insects | ______ | Rose/Jasmine |
| (iv) | Ornithophily | ______ | Brightly coloured, large and showy. They secrete profuse, dilute n ectar | ______ |
When and why does a plant breeder employ the emasculation technique?
Identify the set of correct statements:
- The flowers of Vallisneria are colourful and produce nectar.
- The flowers of waterlily are not pollinated by water.
- In most of water-pollinated species, the pollen grains are protected from wetting.
- Pollen grains of some hydrophytes are long and ribbon like.
- In some hydrophytes, the pollen grains are carried passively inside water.
Choose the correct answer from the options given below:
Which one of the following flower is hypohydrophilous?
Hydrophily (Hypo) is characterized by which of the following conditions?
Autogamy refers to which type of pollination process?
