The Polar Caps on Mars Are Composed of

question 50

Multiple Choice

The polar caps on Mars are composed of

• A)pure solid carbon dioxide.
• B)pure water ice.
• C)mostly solid carbon dioxide and some water ice.
• D)mostly water ice and some solid carbon dioxide.
• E)There are no polar caps on Mars.

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Definitions:

Schwann Cell

A type of glial cell in the peripheral nervous system that wraps around nerve fibers, forming the myelin sheath, which helps in the rapid conduction of nerve impulses.

Myelin Sheath

The fatty layer that covers and insulates axons of many neurons, facilitating the rapid transmission of nerve impulses.

PNS

Abbreviation for Peripheral Nervous System, which encompasses all the nerves outside the brain and spinal cord and connects the CNS to the limbs and organs.

CNS

Stands for Central Nervous System, which includes the brain and spinal cord, responsible for processing and sending out information throughout the body.