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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.
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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.
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संबंधित प्रश्न
With the help of a suitable example, explain protandry.
As a senior biology student you have been asked to demonstrate to the students of secondary level in your school, the procedure(s) that shall ensure cross-pollination in a hermaphrodite flower. List the different steps that you would suggest and provide reasons for each one of them.
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?
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 ?
What are chasmogamous flowers?
The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as ______.
Name two characteristics of flowers in which pollination occur by wind.
Which one of the following is one of the characteristics of self-pollinated flowers?
Fill in the blanks with suitable words.
_______ is a water-pollinated flower.
Give one word/term for the following:
Pollination of flowers by insects.
State four features of flowers pollinated by insects.
- Nucellus
- Antipodals
- Synergids
- Micropyle
Very short answer type question:
What is hydrophily?
At which stage pollen grains are shed from the anther in Angiosperms?
Explain water pollination in detail with its types.
For which of the following attractants and rewards are required?
Autogamy can occur in a chasmogamous flower if ______.
Chief pollinators of agricultural crops are ______.
Feathery stigma occurs in ______.
Plants with ovaries having only one or a few ovules are generally pollinated by ______.
Heterostyly as a contrivance for cross-pollination is found in ______.
Which of the following plant contain unisexual flower?
During Hybridization process anther of the bisexual flower is removed before it dehisces is called ______.
Which one of the following may require pollinators, but is genetically similar to autogamy?
In which one of the following pollination is autogamous?
Correct definition of pollination is ______
Which of the following floral adapation are adapted by hydrophilous flowers?
Mention any one example of the anemophilous flower.
Mention any one example of the hydrophilous flower.
What is hypohydrophily?
