Osteoporosis is enhanced by
a. deficient levels of calcium and vitamin D.
b. lack of physical activity.
c. smoking and excessive alcohol intake.
d. excessive intake of cola drinks
e. all of these.
Answer: e
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The pathogen that causes Legionnaires' pneumonia also causes a milder infection called Pontiac fever.
Answer the following statement true (T) or false (F)
Which of the following is not a condition of genetic equilibrium?
1.Mutations are rare. 2.The population is isolated from all other populations of the species (no gene flow). 3.Mating is random. 4.All individuals survive and produce the same number of offspring.
What muscle tissue is considered involuntary?
a. skeletal only b. smooth only c. cardiac only d. both skeletal and cardiac e. both cardiac and smooth
Well-developed vascular systems are absent in all of the following except
A. hornworts. B. Pterophytes. C. liverworts. D. Charophytes. E. mosses.