Food stored within the seed is the source of nutrients for the young sporophyte
A seed consists of an embryo and a food supply, packaged in a protective seed coat derived from the integuments
The diploid multicellular stage of a plant or alga's life cycle is known as a sporophyte. Each sporophyte cell has a double pair of chromosomes, one set from each parent, because it develops from the zygote created when a haploid egg cell is fertilised by a haploid sperm.
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