Most coastal pollution comes from
a. oil spills from ships.
b. dumping of trash.
c. military disposal.
d. runoff from urban and agricultural lands.
e. nuclear power plants.
D
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Which of the following bacteria is known to be a contributing factor in the development of stomach ulcers?
A. Clostridium tetani B. Vibrio cholerae C. Helicobacter pylori D. Staphylococcus aureus E. Escherichia coli
Capillary walls consist only of
A. a single layer of epithelial cells covered by connective tissue. B. connective tissue. C. a single layer of endothelial cells. D. smooth muscle. E. a single layer of epithelial cells covered by smooth muscle.
The high-pressure flow of blood through the glomerular capillaries:a
allows little plasma to be filtered in the kidney. b. is a result of the high hydrostatic pressure in the glomerular capillaries. c. is due to the large diameter of the efferent arterioles of the glomerular capillaries. d. is due to the small surface area for filtration provided by the glomerular capillaries. e. is due to the low permeability of the glomerular capillaries.
What accounts for the different breeds of domesticated dogs?
A) overproduction B) natural selection C) competition D) artificial selection