DNA could be best described as-- a) All of the possible forms of a gene that can occur in an individual.

b) A five carbon sugar found as part of the structural components of a nucleotide.

c) A structure containing information about the external environment of a cell.

d) A double helix structure that consists of two polynucleotide chains.

Been sitting here trying to take this test and don't know this answer! place the events of a feedback mechanism associated with body temperature in the correct order. ·nerve cells send message from skin to the brain ·body returned to normal temperature around 98.6 degrees f ·temperatures regulation center in the brain sends out signals ·body temperature exceeds 98.6 degrees f ·sweat glands throughout the body activate to cool off skin surface it is a 1 through 5 question in biology!