Which of the following is a biodegradable pollutant?
a. mercury
b. plastic
c. arsenic
d. glass
e. crude oil
e
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Consider two magnets, one with twice the strength of the other. If the strong magnet pulls the weaker one with 100-N of force, the amount of force the weak one exerts on the strong one is
A. more than 100 N. B. exactly 100 N. C. about 50 N. D. not enough information
Researchers were studying a population of birds on Daphne Major, one of the Galápagos Islands. A drought caused many plants on the island to die. There were few seeds left for the birds to eat. Small seeds, which were easy to eat, disappeared quickly. Larger seeds remained available. Birds with thicker beaks were better able to crack and eat these larger seeds. Which of the following statements about the population on Daphne Major is TRUE?
A. Birds with thick beaks are more likely to survive during the drought. B. Birds with thin beaks are more likely to survive during the drought. C. Birds with thin beaks and birds with thick beaks are equally likely to survive during the drought. D. It is impossible to tell from the information provided.
A gorilla is an example of a/an _________
a. Old World monkey b. New World monkey c. hominoid
Precipitation in desert areas is almost always:
a. caused by cyclonic activity. b. associated with the high sun season. c. infrequent, unreliable, and intense. d. caused by orographic lifting of cT air masses.