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प्रश्न
At which stage pollen grains are shed from the anther in Angiosperms?
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उत्तर
At the two-celled stage, pollen grains are shed from the anther in Angiosperms.
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संबंधित प्रश्न
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 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 ?
Make a list of any three outbreeding devices that flowering plants have developed and explain how they help to encourage cross-pollination.
Find the odd-one out, giving reason:
Ovary, style, pollen grain, stigma
Differentiate between geitonogamy and xenogamy (allogamy).
Write different modes of pollination in detail with suitable examples.
The question has four options. Choose the correct answer:
Pollination by insect is known as
Both chasmogamous and cleistogamous flowers are present in ______.
Anemophily type of pollination is found in ______.
Which of the following plant contain unisexual flower?
