The tough, fibrous sac that surrounds, protects and lubricates the heart is the
a. myocardium.
b. epicardium.
c. endocardium.
d. pericardium.
e. trabeculae carnae.
D
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If a father and a son are both color blind and the
mother is normal, is it likely that the son inherited color blindness from his father? What will be an ideal response?
Recent evidence suggests that the early fossils of Homo erectus may actually represent two species,
one being Homo erectus and the other species being:a. Homo sapiens. b. Homo africanus. c. Homo ergaster. d. Homo habilis. e. Homo heidelbergensis
____ is a breakdown in the walls of the alveoli which causes a reduction in gas exchange.
a) Bronchitis b) Asthma c) Emphysema d) tuberculosis
Which of the following can be the final electron acceptor in anaerobic respiration in bacteria?
A) nitrate only B) pyruvic acid only C) sulfate only D) both nitrate and sulfate E) nitrate, pyruvic acid, and sulfate