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प्रश्न
What is polyembryony? How it can commercially exploited.
उत्तर
The occurrence of more than one embryo in a seed is called polyembryony.
- Embryos developed through polyembryony are found virus-free.
- The seedlings formed from nuclear tissue in citrus are found on better clones for orchards.
संबंधित प्रश्न
Read the following statement and answer the questions that follow :
"A guava fruit has 200 viable seeds."
(a) What are viable seeds?
(b) Write the total number of :
(i) Pollen grains (ii) Gametes
in producing 200 viable guava seeds.
c) Prepare a flow-chart to depict the post-pollination events leading to viable-seed production in a flowering plant.
(a) Explain the events after pollination leading to the formation of a seed in angiosperms.
(b) Mention the ploidy levels of the cells of different parts of an albuminous seed.
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:
What happens to the part labelled '5' during the process?
Name the scientists who have contributed to the following:
Discovered double fertilization.
Explain the pollination process in Salvia
Explain the pollination process in maize.
The correct order of haploid, diploid, and triploid structure in fertilized embryo sac is
Male gametes in angiosperms are formed by the division of ______.
Transmitting tissue is found in
Pollen tube was discovered by
Which of the following happens during triple fusion?
In angiosperms, for formation of which of the following triple fusion is necessary?
Identify the function of filiform apparatus.
From the following identify the fate of the male gametes discharged in the synergid.
Double fertilization and triple fusion were discovered by ______.
In ______ sepal is seen on the fruit after fertilization.
All the events from pollen deposition on the stigma until pollen tubes enter the ovules are together referred to as ______.
Which are the three cells found in a pollen grain when it is shed at the three celled stage?
Name the following:
A diploid nucleus in central cell of embryo sac in plants.
