The Primary Problem Animals Faced in Adapting to Life on Land

question 36

Multiple Choice

The primary problem animals faced in adapting to life on land was:

• A) finding a mate in the new environment.
• B) being able to move around in the new environment.
• C) the presence of predators, which was not a problem in the ocean.
• D) the dry atmosphere.
• E) acquiring enough oxygen.

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Definitions:

Sensory Neurons

Neurons that carry incoming information from the sensory receptors to the brain and spinal cord.

Interneurons

Neurons within the brain and spinal cord that communicate internally and intervene between the sensory inputs and motor outputs.

Motor Neurons

Neurons that carry outgoing information from the brain and spinal cord to the muscles and glands.

Endorphins

Natural, pain-relieving chemicals produced by the body that also promote feelings of pleasure and well-being.