It becomes the seed coat. It becomes the endosperm. It becomes the cotyledons. Some of these get their energy from the oxidation of organic compounds with sulfur. In monocots the seed food is the endosperm.
Yeast is valuable because it helps make bread and beer.
Some answers will be used more than once. Consists of a protein coat and a nucleic acid. Used to make tooth paste thickener carrageenan. Causes athlete's foot. Causes herpes, hepatitis, rabies, and influenza.