The Major Difference in the Composition of Earth's Atmosphere Compared

question 17

Multiple Choice

The major difference in the composition of Earth's atmosphere compared to the atmospheres of Venus and Mars is a direct consequence of

• A) life on Earth.
• B) Earth's plate tectonics.
• C) differences in the greenhouse effect.
• D) the presence of liquid water.
• E) differing distances from the Sun.

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Definitions:

Meninges

The three layers of protective membranes—dura mater, arachnoid mater, and pia mater—surrounding the brain and spinal cord.

Myelin Sheaths

Fatty coverings around the axons of some neurons that speed up the transmission of nerve impulses.

Ventricles

Hollow parts or cavities within an organ, in the context of the brain, these are cavities filled with cerebrospinal fluid.

Glia

Non-neuronal cells in the central nervous system that do not produce electrical impulses but play crucial roles in support and maintenance of neural functions.