The portion of tooth that projects above the gums is called the
A. enamel.
B. pulp.
C. dentin.
D. crown.
E. cementum.
Answer: D
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According to the competitive exclusion principle, two species cannot continue to occupy the same _____
A) habitat B) niche C) territory D) range E) biome
Just back from a trip to South America, you now have a severe diarrheal illness. Your symptoms, other than diarrhea, are pain, cramps, some fecal blood, and fever. These are symptoms of many of the gastrointestinal diseases, so that information does not help you or the doctors identify the infectious agent. Your doctor wants to send a fecal sample to the microbiology lab for them to look at it under the light microscope. Based upon this protocol selection, the physician believes that you have ________.
A. rotavirus B. hepatitis A C. salmonellosis D. cholera E. amoebiasis
In which stage of labor is the afterbirth (placenta, fluid, and blood) delivered?
a. the first stage b. the second stage c. the third stage d. in either the first or second stage e. in either the second or third stage
All of the following are abiotic factors within an ecosystem except ________.
A. fire B. nutrients C. energy D. All of the above are abiotic factors.