The ultimate purpose of respiration: a. inhale 02 and exhale co2 b. place oxygen in the lungs c. place oxygen in the blood d. deliver oxygen to every blood cell

D. deliver oxygen to every blood cell

Explanation:

Respiration is the process by which organisms liberate energy from food by chemical processes. It is more appropriately called cellular respiration as the process occurs in the cell.

During respiration, energy is released from food when oxygen combines with food materials. The waste product is carbondioxide in most cases.

The ultimate purpose of respiration(breathing) is to furnish the body system with oxygen at cellular level for the release of energy.

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

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frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.