Plants from the genus Solanum include such common vegetables as potatoes and eggplants. The many species include some plants native to tropical West Africa as well as closely related species native to tropical South America
What might you reasonably conclude? A) The trunks of the plants were used as canoes to cross the Atlantic Ocean.
B) Convergent evolution occurred.
C) The group must have mutated twice.
D) West Africa and South America were once joined.
D
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Imagine that you have two people using breathing gear under water. Diver 1 is using an old style "rebreather" that removes carbon dioxide before the mixture is "rebreathed" and therefore decreases overall carbon dioxide concentrations in the blood. Diver 2 is using regular SCUBA gear and is breathing air with the normal amount of carbon dioxide that does not lower blood levels of carbon dioxide. Which diver would have a higher blood pH and which would feel more an "urge to breathe"?
A. Diver 1 would have higher blood pH and would feel the "urge to breathe" sooner. B. Diver 2 would have higher blood pH and feel the "urge to breathe" sooner. C. Diver 1 would have higher blood pH, while Diver 2 would feel the "urge to breathe" sooner. D. Diver 2 would have higher blood pH, while Diver 1 would feel the "urge to breathe" sooner. E. There would be no difference in blood pH or breathing between the two divers.
Which of the following statements about malaria is FALSE?
a. It kills about 2 million people each year. b. It can be treated with the drug chloroquine. c. An effective vaccine exists to protect from it. d. It can be treated with the drug quinidine. e. It can be treated with the drug quinine.
The types of bonds found in nucleic acids are:
A. phosphodiester bonds. B. ionic bonds. C. peptide bonds. D. nonpolar covalent bonds.
The Sec system is used by ________.
A. neither Gram-positive nor Gram-negative bacteria B. Gram-positive bacteria only C. both Gram-positive and Gram-negative bacteria D. Gram-negative bacteria only