Components of the central nervous system include (check all that apply)
A. projection of neuron from spine to muscle cell.
B. brain.
C. nerve cord.
D. spinal cord.
Answer: D
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Indicate whether the statement is true or false.
What is the name of the area of rising air at the equator?
a. Westerlies b. Doldrums c. Evaporites d. Horse latitudes
Archaea were given their own separate domain because they are ____
a. considered a type of bacteria b. most closely related to eukaryotes c. multicellular d. nucleated e. not prokaryotic
Air rushes into the lungs of humans during inhalation because
A. pulmonary muscles contract and pull on the outer surface of the lungs. B. smooth muscle lining the trachea, bronchi, and bronchioles contracts and causes their volume to increase. C. the diaphragm contracts and pushes upward on the chest cavity. D. pressure in the alveoli increases. E. the volume of the thoracic cavity increases.