Advertisements
Advertisements
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.
Advertisements
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
Geitonogamous flowering plants are genetically autogamous but functionally cross-pollinated. Justify.
Explain the post-pollination events leading to seed production in angiosperms.
Name the part of the flower which the tassels of the corn- cob represent.
Enlist advantages and disadvantages of cross pollination
Find the odd-one out, giving reason:
Ovary, style, pollen grain, stigma
Define the term Pollinating.
Fill in the blanks with suitable words.
_______ is a water-pollinated flower.
Mention any two contrivances in flowers which favour cross-pollination.
Answer the following question.
Express the process of pollination in Vallisneria.
Answer the following question.
Write the difference in the characteristics of the progeny produced as a result of the two processes.
Can a plant flowering in Mumbai be pollinated by pollen grains of the same species growing in New Delhi? Provide explanations to your answer.
Describe pollination. How many types of pollinations are found?
Describe the Advantages and Disadvantages of self-pollination to the Plant.
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
Pollination by water occurs in ______.
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by ______.
Anemophily type of pollination is found in ______.
Which of these is a condition that makes flowers invariably autogamous?
In some plants anther and stigma mature at the same time this condition is called ______.
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 |
Which type of pollination does the figure indicate?
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 |
Describe any three adaptations in hydrophilous flowers.
Mention any one example of the hydrophilous flower.
Name the following:
One plant each of Hypohydrophily and epihydrophily.
Comparatively a large amount of pollen grains are wasted during ______.
Bird pollinated flowers are usually ______.
