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प्रश्न
Why fertilization process in angiosperms is called as double fertilization?
उत्तर
In fertilization process of angiosperms, both the male gametes participate, due to which fertilization occurs twice in the same embryo sac, hence it is described as double fertilization.
संबंधित प्रश्न
Match the items in Column A with those in Column B.
|
Column A |
Column B |
|
(a) Generative nucleus |
(i) Pollen tube |
|
(b) Germ pore |
(ii) Endosperm nucleus |
|
(c) Exine |
(iii) Testa |
|
(d) Secondary nucleus |
(iv) Fertilization |
|
(e) Integument |
(v) Male nuclei |
|
(f) Egg nucleus |
(vi) Rough |
Given ahead is a diagrammatic sketch of the sectional view of a germinating pollen grain. Study the same and then answer the question that follows:
Name the parts labelled 1, 2, 3, 4 and 5.
What is ‘double fertilization’? Describe it with the help of a neat and well-labeled diagram. Give its importance.
What is the significance of the dispersal of seeds? Give any two points.
The question has four options. Choose the correct answer:
The study of fruits is known as
The seed is a fertilized _______.
The success of seed plants on land is mainly due to ______.
Which are the three cells found in a pollen grain when it is shed at the three celled stage?
In the figure given below label the following parts: male gametes, egg cell, polar nuclei, synergid and pollen tube
Identity the part of embryo sac which takes part in formation of primary endosperm nucleus during fertlisation
