In a type of apomixis known as adventive embryony, embryos develop directly from

Nucellus or integument

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Zygote

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Synergids or antipodals of embryo sac

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Accessory embryo sacs in the ovule.

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Solution

The correct option is B Nucellus or integument
Apomixis is a kind of asexual reproduction in which viable embryo is formed within the confines of seed coat without meiosis and syngamy. Apomixis includes adventive embryony in which, there is formation of extra embryos due to sporophytic budding. One or more sporophytic cells, either nucellus or integuments undergo stages of embryogeny and eventually develop into mature embryos.
So, the correct answer is A.

Suggest Corrections

List-I(Meaning)	List-II(Phenomenon)
a. Embryos arise directly from diploid saprophytic cells(nucleus or integuments)	$1$ . Parthenogenesis
b. An archesporium differentiates but the megaspore mother cell develops into an unreduced embryo sac	$2$ . Polyembryony
c. Many embryos arising in one ovule	$3$ . Adventitious embryony
d. The development of embryo from unfertilized egg	$4$ . Diplospory