<P> Angiosperm ( flowering plants ) seeds consist of three genetically distinct constituents : ( 1 ) the embryo formed from the zygote , ( 2 ) the endosperm , which is normally triploid , ( 3 ) the seed coat from tissue derived from the maternal tissue of the ovule . In angiosperms , the process of seed development begins with double fertilization , which involves the fusion of two male gametes with the egg cell and the central cell to form the primary endosperm and the zygote . Right after fertilization , the zygote is mostly inactive , but the primary endosperm divides rapidly to form the endosperm tissue . This tissue becomes the food the young plant will consume until the roots have developed after germination . </P>
<P> Angiosperm ( flowering plants ) seeds consist of three genetically distinct constituents : ( 1 ) the embryo formed from the zygote , ( 2 ) the endosperm , which is normally triploid , ( 3 ) the seed coat from tissue derived from the maternal tissue of the ovule . In angiosperms , the process of seed development begins with double fertilization , which involves the fusion of two male gametes with the egg cell and the central cell to form the primary endosperm and the zygote . Right after fertilization , the zygote is mostly inactive , but the primary endosperm divides rapidly to form the endosperm tissue . This tissue becomes the food the young plant will consume until the roots have developed after germination . </P>
in a seed the seed coat is composed of tissues belonging to
in a seed the seed coat is composed of tissues belonging to
the maternal tissue of the ovule
the maternal tissue of the ovule