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प्रश्न
Autogamy can occur in a chasmogamous flower if ______.
विकल्प
Pollen matures before maturity of ovule
Ovules mature before maturity of pollen
Both pollen and ovules mature simultaneously
Both anther and stigma are of equal lengths.
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उत्तर
Autogamy can occur in a chasmogamous flower if both pollen and ovules mature simultaneously.
Explanation:
Autogamy in chasmogamous flowers occurs when pollen and ovules mature at the same time, allowing pollen to fertilize ovules within the same flower. Without simultaneous maturity, self-pollination is unlikely in open flowers like chasmogamous ones.
APPEARS IN
संबंधित प्रश्न
With the help of a suitable example, explain protandry.
Describe the characteristic features of wind pollinated flowers.
Make a list of any three outbreeding devices that flowering plants have developed and explain how they help to encourage cross-pollination.
Define the term Pollinating.
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 ________.
Name of the part of the ovary which gives rise to:
Fruit ______
State four features of flowers pollinated by insects.
Differentiate between geitonogamy and xenogamy (allogamy).
Put a tick mark (✓) against the correct alternative in the following statements
Pollen is produced in the
What are the adaptations which are required in self-pollinated plants?
Cleistogamous flowers are ______.
A dioecious flowering plant prevents both ______.
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?
The flower which does not open at all are called ______.
Pollination refers to the ______.
Which type of pollination does the figure indicate?
In which one of the following pollination is autogamous?
Name the following:
Aquatic plants which are anemophilous.
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 | ______ |
Briefly discuss any two methods by which plants avoid self-pollination.
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.
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:
Hydrophily (Hypo) is characterized by which of the following conditions?
Which plant is an example of ornithophily?
