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प्रश्न
Which of the following represent megagametophyte
विकल्प
Ovule
Embryo sac
Nucellus
Endosperm
उत्तर
Embryo sac
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 |
Name of the part of the ovary which gives rise to:
Seed ______
Explain the following term:
Elephophily
Given ahead is a diagrammatic representation of the process of fertilization. Study the same and then answer the question that follows:
What is the function of the synergids?
What is ‘double fertilization’? Describe it with the help of a neat and well-labeled diagram. Give its importance.
The question has four options. Choose the correct answer:
The study of fruits is known as
Long Answer Question:
Draw a labeled diagram of the L.S. of anatropous ovule and list the components of the embryo sac and mention their fate after fertilization.
Why fertilization process in angiosperms is called as double fertilization?
The seed is a fertilized _______.
Assertion: Sporopollenin preserves pollen in fossil deposits
Reason: Sporopollenin is resistant to physical and biological decomposition
Syngamy results in the formation of ______.
In Haplopappus gracilis, number of chromosomes in cells of nucellus is 4. What will be the chromosome number in Primary endosperm cell?
‘Pollination in Gymnosperms is different from Angiosperms’ – Give reasons.
Due to which of the following reasons the pollen tube usually grows down towards the egg?
From the following identify the fate of the male gametes discharged in the synergid.
If the cells of the nucellus in the angiosperm ovule contain 24 chromosomes, then ____________ chromosomes will be present in the endosperm of a self-pollinated flower.
Can an unfertilised, apomictic embryo sac give rise to a diploid embryo? If yes, then how?
Which are the three cells found in a pollen grain when it is shed at the three celled stage?
Select the option that shows the correctly identified 'U', 'X', 'Y' and 'Z' in a developing dicot embryo.
