What is polyembryony and how can it be commercially exploited?
Presence of more than one embryo in a seed is known as polyembryony.
It can be commercially exploitd in many ways, out of which few are listed below:
i. It helps in plant breeding
ii. It helps in horticulture
iii. Plantlets obtained from these embryos are virus free and more vigorous, resulting in high productivity.
iv. All these embryos can be isolated and grown on embryo culture to produce clones.
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Name two hormones that are constituents of contraceptive pills. Why do they have high and effective contraceptive value? Name a commonly prescribed non-steroidal oral pill.
(a) How are Parthenocarpic fruits produced by some plants and apomictic seeds by some others? Explain.
(b) When do farmers prefer using apomictic seeds?
Biology - Board Papers
Are parthenocarpy and apomixis different phenomena? Discuss their benefits.
Hint: Yes, parthenocarpy and apomixis different phenomena. Parthenocarpy leads to development of seedless fruits. Apomixis leads to embryo development.
Biology - Exemplar
Embryo sacs of some apomictic species appear normal but contain diploid cells. Suggest a suitable explanation for the condition.Biology - Exemplar
Are pollination and fertilisation necessary in apomixis? Give reasons.Biology - Exemplar