Advertisements
Advertisements
प्रश्न
Where is sporopollenin present in plants?
उत्तर
Sporopollenin is present in exine of pollen grains in plants.
APPEARS IN
संबंधित प्रश्न
A flower of brinjal plant following the process of sexual reproduction produces 360 viable seeds.
Answer the following questions giving reasons:
(a) How many ovules are minimally involved?
(b) How many megaspore mother cells are involved?
(c) What is the minimum number of pollen grains that must land on stigma for pollination?
(d) How many male gametes are involved in the above case?
(e) How many microspore mother cells must have undergone reduction division prior to dehiscence of anther in the above case?
Give an example of a plant which came into India as a contaminant and is a cause of pollen allergy.
Name the organic materials exine and intine of an angiosperm pollen grains are made up of. Explain the role of exine.
Draw a T.S. of a young anther of an angiosperm. Label the different layers of the wall and write their functions.
Answer the following question.
Pollen banks are playing a very important role in promoting plant breeding programs the world over. How are pollens preserved in the pollen banks? Explain. How are such banks benefitting our farmers? Write any two ways.
Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called ______.
In angiosperms, all the four microspores of tetrad are covered by a layer which is formed by ______.
The anther wall consists of four wall layers where ______.
Pollen grain is a ______.
Male gametophyte in angiosperms produces ______
