An insufficient supply of chemical energy in the diet or a shortage of one or more essential nutrients results in __________.
a. malnutrition
b. undernourishment
c. protein deficiency
d. hypernutrition
e. All of the listed responses are correct.
Answer: a. malnutrition
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In a population of bacteria, about 25 percent of the population has resistance to the antibiotic
penicillin. After a few days, 50 percent of the population has the resistant gene. Assume the population did not simply reproduce. How might this antibiotic resistance have spread in the population?
a. The gene for antibiotic resistance is found in plasmids, which can be transferred between bacteria. b. Bacteria are able to swap genes between their nucleoid and plasmids. c. The antibiotic must have been introduced into the population, which then evolved by natural selection. d. Genetic material in the nucleoid is shared among the population of bacteria.
A(n) exponential growth curve has a J shape. Indicate whether the statement is true or false
A provirus:
A) was the first virus discovered by Wendell Stanley at the Rockefeller Institute B) caused the influenza epidemic of 1918 C) is composed of DNA or RNA surrounded by a protein capsid D) infects bacterial cells E) is viral DMA integrated into host DNA
If an arteriole has a radius of 64 micrometers (?m) and a capillary in the same organ has a radius of 8 ?m, what is the difference in resistance in blood flow between the two?
A. The resistance in the arteriole is 96 times the resistance in the capillary. B. The resistance in the capillary is 48 times the resistance in the arteriole. C. The resistance in the arteriole is 6 times the resistance in the capillary. D. The resistance in the arteriole is 48 times the resistance in the capillary. E. The resistance in the capillary is 6 times the resistance in the arteriole. F. The resistance in the capillary is 96 times the resistance in the arteriole.