- A Regenerating embryos that have already been largely lost from otherwise mature, largely developed seed tissue structures under usual circumstances
- B Saving hybrid embryos that would otherwise abort due to genetic incompatibility by culturing excised embryos on artificial medium
- C Cloning plants considerably more rapidly than would be possible through conventional vegetative propagation methods alone according to most researchers
- D Producing polyploid plants mainly, with few other documented breeding applications existing for this particular technique in the majority of cases studied
Correct answer: B. Saving hybrid embryos that would otherwise abort due to genetic incompatibility by culturing excised embryos on artificial medium
Explanation: Embryo rescue: in wide crosses between species, endosperm often fails (EBN mismatch, incompatible maternal signals). Immature embryos excised and cultured in vitro before abortion, recovering viable hybrid plants.
Concept context
Flower structure, pollination, double fertilization, and seed/fruit development — the highest-scoring Class 12 biology chapter in NEET.
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