Imagine a planet that has a similar atmospheric pressure to Earth (760 mmHg), but different concentrations of gases in its atmosphere
On this hypothetical planet, oxygen makes up
10% of the atmosphere, nitrogen makes up 15%, and carbon dioxide makes up the
remaining 75%. Based on this information, what is the partial pressure of oxygen on this new
planet?
A. 76 mmHg
B. 114 mmHg
C. 160 mmHg
D. 571 mmHg
E. 646 mmHg
A
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The osmoregulatory and ionoregulatory problems facing a saltwater fish are
A. loss of water and loss of ions. B. loss of water and gain of ions. C. gain of water and loss of ions. D. gain of water and gain of ions. E. buildup of urea in tissues.
The response to selection, R, is equal to
A) the heritability (h2) of a trait. B) the strength (S) of selection. C) the difference between h2 and S. D) S/h2. E) h2S.
What differentiates an organic compound from an inorganic compound?
a. An organic compound lacks isotopes. b. An organic compound contains carbon. c. An organic compound lacks valence electrons. d. An organic compound is basic rather than acidic. e. An organic compound contains two or more atoms
Figure 22.3
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Questions refer to the above figure.
Which of the photographs in the above figure is a gymnosperm?
A. A B. B C. C D. D E. Both C and D