The Smallest Living Unit Within the Human Body Is

question 137

Multiple Choice

The smallest living unit within the human body is

• A) the cell.
• B) an organ.
• C) a tissue.
• D) a protein.
• E) an organ system.

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Definitions:

Circadian Rhythm

A natural, internal process that regulates the sleep-wake cycle and repeats on each rotation of the Earth roughly every 24 hours.

Biological Process

Complex interactions among molecules, cells, and organisms that fulfill essential life functions.

Day

The period of 24 hours from one midnight to the next, or the part of this period when it is light and which is distinguished from night.

SRY Gene

A gene on the Y chromosome responsible for initiating male sex determination in humans and most other mammals.