Meselson and Stahl's experiment followed

A) the distribution of different-weighted DNA over multiple generations of bacteria.

B) the ability of a protease or nuclease to stop the transmission of DNA over generations.

C) viruses injecting their DNA into bacteria.

D) DNA sequences in people who are politically liberal compared to those who are sometimes politically conservative.


A) the distribution of different-weighted DNA over multiple generations of bacteria.

Biology & Microbiology

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The most direct ancestors of modern plants were

a. sponges. b. animals. c. green algae. d. cyanobacteria. e. fungi.

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Refer to Figure 50-3. The cervix is labeled:


a. 3
b. 4
c. 5
d. 7
e. 8

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If trying to isolate a specific pathogen from amongst a variety of normal microbiota, which type of media would be most helpful?

A.) nutrient agar B.) differential media C.) blood agar D.) selective and differential agar

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Unsaturated fatty acids are those containing ________ carbon-carbon double bond(s).

A. one or more B. only one C. two or more D. exactly two

Biology & Microbiology