Which of these can lead to polyembryony?
a. Proliferation of nuclear cells into embryo
b. Fertilization of helper cells (synergids) by sperms carried by another pollen tube into the embryo sac
c. Cleavage of pro-embryo during embryo development.

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a only

a and c

a, b and c

b only

answer is D.

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Detailed Solution

Occurrence of more than one embryo in a seed is referred to as polyembryony.

Proliferation of nuclear cells into embryo, fertilization of helper cells by sperms carried by another pollen tube in embryo sac and cleavage in pro-embryo during embryo development can lead to polyembryony.

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