Dr. Ratard was trying to determine the cause of a mysterious epidemic affecting fish in the gulf of New Mexico. His proposal that the deaths were caused by an organism called a protist is considered a(n)

A. experiment.
B. hypothesis.
C. data set.
D. conclusion.
E. theory.


Answer: B

Biology & Microbiology

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Excessive iron absorption and accumulation to toxic levels is associated with _____

A) excessive blood volume B) a liver abnormality that results in a decreased number of red blood cells C) various forms of inherited or acquired anemia D) the genetic disorder known as hemochromatosis E) menstruation and menopause

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Because RNA is single-stranded, it does not participate in the regulation of gene expression

a. True b. False Indicate whether the statement is true or false

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What is the target of anthrax protective antigen (PA), edema factor, and lethal factor?

A. Endothelial cells lining the capillaries B. Cells lining the alveoli in the lungs C. Macrophages D. Neurons

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B is an intron between two exons, A and C. Which representation best describes how this region of mRNA will appear after it is transcribed and processed by a spliceosome?

A) A-C B) A-B C) B-C D) A-B-C

Biology & Microbiology