Polyembryony commonly occurs in\

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Professor PC Thomas Classes · Answer

(d): Polyembryony refers to the phenomenon of having more than one embryo in the same seed. In Citrus, a seed has 2-40 embryos, one normal embryo and the rest adventitive embryos (mostly nucellar). In adventitive embryony, an embryo develops directly from a diploid cell other than egg like that of nucellus and integument, e.g. Citrus, Opuntia., etc.