Interbreeding between Neanderthals and modern H. sapiens likely took place in ____ around _____ years ago, before H. sapiens spread around the world
A. the Middle East; 60,000
B. Africa; 60,000
C. the Middle East; 200,000
D. Africa; 200,000
E. the Middle East; 1.4 million
A
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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.
How many cervical vertebrate are found in an intact skeleton?
a. 5 b. 7 c. 9 d. 12 e. 15
A strain of E. coli is unable to use the UV repair pathway because of an apparent absence of DNA helicase activity. Which UV repair gene is likely mutated in this strain?
A) uvr-A B) uvr-B C) uvr-C D) uvr-D E) pol I
Which of these is NOT one of the large veins carrying blood to the heart?
A. superior vena cava B. inferior vena cava C. pulmonary trunk D. pulmonary vein E. coronary sinus