Which of the following statements concerning the heart is false?
a. It is an organ.
b. It contains endothelium.
c. It contains nerves
d. It is an organ system.
e. Its muscles contain elongated fibers.
d
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Where are the major deserts of the world located?
A) 30° north and south of the equator B) 23.5° north and south of the equator C) 45° north and south of the equator D) the equator
During the cardiac cycle, which of the
following is the correct order of events?
a. atria contract, atria and ventricles relax, ventricles contract b. ventricles contract, atria contract, atria and ventricles relax c. atria and ventricles relax, atria contract, ventricles contract d. ventricles contract, atria and ventricles relax, atria contract e. none of these
Bacteria and eukaryotes have similar sized ribosomes.
a. true b. false
Adaptive mechanisms are also utilized by plants to increase or decrease growth in organs that directly or indirectly participates in nutrient acquisition.
Indicate whether the statement is true or false.