Which is the most common type of embryo sac occurring in flowering plants?
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Solution
Embryo sac:
The female gametophyte of seed plants consists of a thin-walled sac in the nucleus containing the egg nucleus and other nuclei that produce the endosperm during fertilization.
It is the embryo sac of seed-bearing plants, located in the ovule, that produces the endosperm and forms the ovum or nucleus from which the embryo develops after fertilization.
Monosporic embryo sac:
The most common embryo sac in the flowering plants is monosporic, 7 celled and 8 nucleated.
The haploid blastocyst, also known as the polygonal blastocyst, is the most common type of blastocyst in flowering plants.
It develops after mitosis and three consecutive mitoses in the megaspore parent cell.
The normal or polygonal blastocyst type is a haploid nucleus.
Its nucleus divides three times to form eight nuclei.
