Before Life Evolved on Earth, the Atmosphere

question 36

Multiple Choice

Before life evolved on Earth, the atmosphere

• A) had much higher concentrations of oxygen.
• B) had much lower concentrations of carbon dioxide.
• C) was more or less the same as it is now.
• D) had much lower concentrations of oxygen.
• E) had much lower concentrations of hydrogen.

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Definitions:

Sensory Input

Information received by the body's sensory organs, which is then sent to the brain for processing.

Body Maintenance

The biological processes and behaviors that keep the body functioning properly, including repair and immune responses.

Basic Visual Information

The fundamental elements of what the eye perceives, such as color, shape, boundaries, movement, and spatial relationships.