A new compound developed in the lab was tested as a DNA mutagen. When the Ames test was performed, the results were numerous bacterial colonies following exposure. This result means

A) the chemical is safe.
B) the chemical is radioactive.
C) the chemical is a carcinogen and a low-level mutagen.
D) the chemical is a mutagen and may also be a carcinogen.
E) the chemical can be moved to human trials.


D) the chemical is a mutagen and may also be a carcinogen.

Biology & Microbiology

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The ____ are potentially pathogenic to humans

a. Archaea

b. Bacteria c. Archaea and Bacteria d. cyanobacteria e. methanogens

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You have type A blood (genotype IAi). Who can you donate blood to in an emergency?

a. type O only b. type AB only c. type A only d. types A and B, not O e. types A and AB

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The maximum density of pure water occurs at:

a. -2° C. b. 0° C. c. 3° C. d. 4° C. e. -4° C.

Biology & Microbiology

Compare and contrast characteristics of amphibians and reptiles. Include morphological structures,

differences in reproduction, respiration, circulation, and their habitats. What will be an ideal response?

Biology & Microbiology