The epidermis of the skin consists of many layers of tightly packed cells. the outermost layer of cells are dead. which best describes why this occurs?
chemical compounds containing digestive enzymes are located on the outside of the skin, and they destroy the cells.
blood vessels are not located in the epidermis, but in the underlying dermal connective tissue.
the outer layer of skin is nervous tissue and nervous tissue will not regenerate.
pathogens on the skin secrete toxins that affect the cellular structure, thus destroying the cell.

The many volcanoes located along the edge of the pacific ocean make up the ring of fire. how does subduction play a role in the volcanic activity in the ring of fire?

The empty trna moves off and picks up another matching amino acid from the cytoplasm in the cell. the anticodon of the trna, with its attached amino acid, pairs to the codon of the mrna, which is attached to a ribosome. this sequence is repeated until the ribosome reaches a stop codon on the mrna, which signals the end of protein synthesis. the ribosome forms a peptide bond between the amino acids, and an amino acid chain begins to form. when a second trna with its specific amino acid pairs to the next codon in sequence, the attached amino acid breaks from the first trna and is bonded to the amino acid of the second trna.

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