The constant appearance of new strains of influenza virus is an example of ________.

A. a model
B. success
C. evolution
D. survivorship
E. selection pressure


Answer: C

Anatomy & Physiology

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These receptors respond to pain caused by external and internal stimuli.

A. Chemoreceptors B. Mechanoreceptors C. Nociceptors D. Thermoreceptors E. Photoreceptors

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__________ nerves arise from the brain and generally innervate structures of the head and neck.

Fill in the blank(s) with the appropriate word(s).

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Indicate whether this statement is true or false.

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