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Questions
Give any four points of significance of double fertilization.
Give the significance of double fertilization.
Solution
- It is a unique feature of angiosperms.
- It ensures that the parent plant invests a seed with a food store only if the egg is fertilized.
- The diploid zygote develops into an embryo, which consequently develops into a new plant.
- The triploid PEN develops into nutritive endosperm tissue.
- It restores the diploid condition by the fusion of the haploid male gamete with the haploid female gamete (i.e., through syngamy).
- It also helps to avoid polyembryony.
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RELATED QUESTIONS
What is triple fusion?
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 |
Give one word/term for the following:
When pollen grains of a flower reach the stigma of the same flower.
Explain the Following Term:
Ornithophily
What is the function of the pollen tube? Explain it with the help of a diagram.
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.
Caruncle develops from
What is Mellitophily?
In ______ sepal is seen on the fruit after fertilization.
