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Question
Mention one advantage of apomictic seeds to farmers.
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Solution
Embryos formed through apomixis are generally free from infections.
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RELATED QUESTIONS
Explain any three advantages that seeds offer to angiosperms.
Explain the different ways apomictic seeds can develop, Give an example of each.
Answer the following question.
When a seed of orange is squeezed, many embryos, instead of one are observed. Explain how it is possible.
State what is apomixis. Write its significance. How can it be commercially used?
Fill in the blank:
The ________contains the egg or ovum.
Fill in the blank:
________is the transfer of pollen grains from the anther of the flower to the stigma of the same or a different flower
Fill in the blanks:
The ______ are coloured to attract the insects that carry the pollen. Some flowers also produce ______ or ______ that attracts insects.
Fill in the blank:
The whorl ________is green that protects the flower until it opens.
Match the column.
| Column - I (Structure before seed formation) |
Column - II (Structure after seed formation) |
||
| A. | Funiculus | I. | Hilum |
| B. | Scar of ovule | II. | Tegmen |
| C. | Zygote | III. | Testa |
| D. | Inner integument | IV. | Stalk of seed |
| V. | Embryo | ||
Apomixis is a type of reproduction that results is the development of a/an ______.
What is pollen grain?
The plant part which consists of two generations, one within the other-
- Pollen grains inside the anther.
- Germinated pollen grain with two male gametes.
- Seed inside the fruit.
- Embryo sac inside the ovule
Choose the correct option.
Explain following term:
Polyembryony
What is the source of polyembryos in Balanophora?
Which embryo typically survives in polyembryonic seeds?
Which of the following is NOT a type of polyembryony in the four-type classification system?
Which of the following is an example of sporophytic cell activation polyembryony?
Which mechanism involves the splitting or division of the zygote or proembryo into multiple parts?
Which theory explains polyembryony through the release of chemical stimuli from degenerating cells?
