The Ames test measures the ability of a chemical to revert a prototroph back to its original auxotrophic state.
A) True
B) False
B) False
Feedback: This statement is false because the Ames test measures the ability of a chemical to revert an auxotroph back to its original prototrophic state.
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The type of reproductive isolation in which two populations live in the same habitat but remain isolated from one another due to one being active during the daytime only and the other being active only during the night is
A. gametic isolation. B. mechanical isolation. C. behavioral isolation. D. sexual selection. E. temporal isolation.
Four of the five features listed below are found in
sponges. Select the exception. a. mesoglea b. spicule c. gemmule d. flagellated collar cells e. amoeboid cells
Your sister cut herself with a knife, and within a few days, she had a severe pus-producing infection of the hand. A day later, skin begins to come off, exposing muscle and other tissue below the skin. Predict what caused the severity of this infection.
A. The infectious agent is a fungus. B. This is not an infectious disease; it is an autoimmune disease. C. The infectious agent is likely a virus. D. The infectious agent produces exotoxins.
Which of the following is a correct sequence of events in the history of life on Earth?
A) prokaryotes, photosynthesis, eukaryotes, land organisms B) Cambrian explosion, multicellular organisms, photosynthesis, eukaryotes C) aquatic organisms, photosynthesis, RNA world, land organisms D) prokaryotes, eukaryotes, land animals, land plants