According to Figure 12.43 when did the Rocky Mountains form?
A) 540 million years ago
B) 430 million years ago
C) 300 million years ago
D) 170 million years ago
E) 50 million years ago
Answer: E
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Phytoplankton are responsible for how much of the surface ocean's carbohydrate production?
a. Between 30 and 36% b. Between 40 and 46% c. Between 50 and 56% d. Between 70 and 76% e. Between 90 and 96%
A particular reaction has an equilibrium constant of 1 x 10-15. Which of the following best describes the relationship between the equilibrium constant and the reaction rate?
A) Because the equilibrium constant is small the reaction proceeds slowly. B) There is no relationship between the size of the equilibrium constant and the rate of the reaction. C) Both a and b are true. D) Neither a nor b is true.
Coral reefs cover less than ________ of the ocean's surface area but they are home to ________ of all marine species
A) 0.5%; 25% B) 1.0%; 25% C) 0.5%; 33% D) 1.0%; 33% E) 1.0%; 50%
Which of the following is not a problem with generalizing the results of LD50 to humans?
A. Differences in metabolism can lead to different reactions. B. Differences in physiology and metabolism can lead to different reactions. C. Different individuals of the same species can have different reactions. D. Smaller species generally have reactions that are more sensitive. E. Closely related species can have different reactions.