Advertisements
Advertisements
प्रश्न
Autogamy can occur in a chasmogamous flower if ______.
पर्याय
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.
A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds.
Answer the following questions giving reasons :
(a) What is the minimum number of pollen grains that must have been involved in the pollination of its pistil?
(b) What would have been the minimum number of ovules present in the ovary?
(c) How many megaspore mother cells were involved?
(d) What is the minimum number of microspore mother cells involved in the above case?
(e) How many male gametes were involved in this case?
Name the part of the flower which the tassels of the corn- cob represent.
Add a note on pollination mechanism in Salvia.
Write two ways in which pollination may occur in plants.
Differentiate between the following:
Self pollination and cross pollination.
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:
When stigma and anthers do not grow up to the same height, which favors only cross-pollination.
Describe the advantages and disadvantages of cross-pollination to the plant.
State four features of flowers pollinated by insects.
Differentiate between geitonogamy and xenogamy (allogamy).
Can a plant flowering in Mumbai be pollinated by pollen grains of the same species growing in New Delhi? Provide explanations to your answer.
What is a flower? Draw a typical flower and label its different parts.
What are the adaptations which are required in self-pollinated plants?
Very short answer type question:
What is hydrophily?
At which stage pollen grains are shed from the anther in Angiosperms?
What are the different adaptations shown by bird-pollinated flowers?
Explain water pollination in detail with its types.
Give an account of any two biotic agents for pollination along with their adaptations.
For which of the following attractants and rewards are required?
A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by ______.
Chief pollinators of agricultural crops are ______.
Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in ______.
Pollination refers to the ______.
Briefly discuss any two methods by which plants avoid self-pollination.
Comparatively a large amount of pollen grains are wasted during ______.
Geitonogamy is characterized by which of the following?
Autogamy refers to which type of pollination process?
