HIV Is Believed to Have Arisen by Mutation of a Virus

question 3

True/False

HIV is believed to have arisen by mutation of a virus endemic to wild animals in Africa.

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Definitions:

Alveoli

Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.

Countercurrent Exchange

A mechanism where fluids flow in opposite directions in adjacent channels, maximizing transfer rates of heat, gases, or other substances.

Concurrent Exchange

A process where two substances in close proximity exchange properties or substances simultaneously, often used in reference to heat or gas exchange in biological systems.

Crosscurrent Exchange

A mechanism of exchange (often of gases or fluids) in opposite or perpendicular directions, enhancing the efficiency of transfer.