The example of a nonpoint source of freshwater is the first option: <span>pesticide runoff from farm fields. This is one of the most common nonpoint source of poullution</span>
Relaxin
<span>Relaxin, secreted by the corpus luteum of the ovary as well as the placenta, is responsible for helping to inhibit uterine activity and to soften the cervix and the collagen in joints. Softening of the cervix allows for dilatation at birth; softening of collagen allows for laxness in the lower spine and so helps enlarge the birth canal. The effect of estrogen is to cause breast and uterine enlargement. Progesterone has a major role in maintaining the endometrium, inhibiting uterine contractility, and aiding in the development of the breasts for lactation. Human placental lactogen (hPL), also known as human chorionic somatomammotropin, serves as an antagonist to insulin, making insulin less effective, thereby allowing more glucose to become available for fetal growth.</span>
The relation between amino acid and polypeptide is similar to the relation between nucleotide and nucleic acid.
Amino acids join together to form polypeptides, which are another name for proteins, through a series of peptide bonds. The interactions between the side chains of the polypeptide's amino acids will determine which conformation the polypeptide will fold into next.
Amino acids, which are small organic molecules with an alpha carbon atom linked to an amino group, a carboxyl group, a hydrogen atom, and a variable component known as a side chain, are the building blocks of proteins . A protein is made up of a long chain of amino acids that are connected by peptide bonds. A water molecule is removed during a biochemical process that joins the carboxyl group of one amino acid to the amino group of a nearby amino acid to form peptide bonds. The primary structure of a protein is thought to be its linear amino acid sequence.
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Answer:
The form of energy entering the food chain is sunlight, which is being taken by plant to produce the glucose as their food energy.
