Answer:
Amino acids are the monomers that make up proteins. Each amino acid has the same fundamental structure, which consists of a central carbon atom bonded to an amino group (–NH2), a carboxyl group (–COOH), and a hydrogen atom.
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<span>A group of cells that function together to perform a special activity is known as a tissue. Epithelial tissues are the tissues that lines inside of hollow organs. </span><span> Epithelial tissues covers body surfaces; lines the body cavities and hollow organs.</span>
Answer:
1) Index fossils are of organisms that lived over a wide area. They lived for a fairly short period of time. An index fossil allows a scientist to determine the age of the rock it is in.
2) Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages.
Explanation:
