Deforestation:a
retards soil erosion.
b. releases carbon dioxide that may contribute to global warming.
c. has no effect on the extinction of biological species.
d. promotes the preservation of tropical birds.
e. is only a threat to tropical rain forests.
b
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In a four-chambered heart, which of the
following would have the thickest muscle?
a. right atrium b. left atrium c. right ventricle d. left ventricle e. both ventricles would have equally thicker muscle than the atria
Sickle-cell anemia is caused by ____
a. an RNA error b. expansion mutation c. deletion mutation d. fragile X syndrome e. a base-pair substitution mutation
Platelets
A) act in inflammation. B) are not whole cells. C) function in hemostasis. D) all of the above.
Athlete's foot is caused by
A. Candida. B. Ergot. C. Claviceps. D. Aspergillus. E. None of the answers is correct.