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प्रश्न
In majority of plants pollen is liberated at
विकल्प
1 celled stage
2 celled stage
3 celled stage
4 celled stage
उत्तर
2 celled stage
संबंधित प्रश्न
Differentiate between outbreeding and outcrossing.
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 |
What are the advantages of the following in the flower to the plant concerned?
Fragrant nectar
What is ‘double fertilization’? Describe it with the help of a neat and well-labeled diagram. Give its importance.
Explain the pollination process in Salvia
Explain double fertilization and its significance.
What happens to the ovary post fertilization?
The question has four options. Choose the correct answer:
The study of fruits is known as
Why fertilization process in angiosperms is called as double fertilization?
Write a short note on Pollen kitt.
Explain the development of a Dicot embryo
The success of seed plants on land is mainly due to ______.
Identify the CORRECT statement with reference to cellular endosperm.
What would be the number of chromosomes in the megaspore mother cell of the plant if an endosperm of an angiosperm has 24 chromosomes?
In a fertilised embryo sac, the haploid, diploid, and triploid structures are ______.
Double fertilization is characteristic of ______.
In ______ sepal is seen on the fruit after fertilization.
Find out the CORRECT sequence of events taking place in pollen - pistil interaction.
- Pollen tube enters one of the synergids and bursts to release male gametes.
- Pollen tube enters the ovule through the micropyle of the ovary.
- The pollen tube grows through the stigmatic tissue and then style.
- Pistil recognizes the correct pollen and accepts it.
Which is the triploid tissue in a fertilised ovule? How is the triploid condition achieved?
