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B
Vertical
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C
Variable
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D
Oblique
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Solution
The correct option is A Transverse The correct answer is A.
After fertilization, the zygote and endosperm are present within the ovule.Then the zygote undergoes an asymmetric transverse cell division that gives rise to two cells (a small apical cell resting above a large basal cell).These two cells are very different, and give rise to different structures,establishing polarity in the embryo.