Tuberculosis is caused by
A. mosquitoes.
B. houseflies.
C. viruses.
D. bacteria.
E. protozoa.
Answer: D
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A species of lizard has gone extinct. All of the following may have contributed to this extinction except ________
A) introduction of a species that competed for food resources B) increased genetic diversity within the species C) climate change D) inbreeding E) habitat destruction by humans
Which of the following is the correct relationship between the rad and the gray?
A) 1 Gy = 100 rad B) 1 Gy = 1000 rad C) 1 Gy = 0.01 rad D) 1 Gy = 0.001 rad
The main mechanism for melting at spreading ridges is decompression melting of ultramafic mantle rock
Indicate whether the statement is true or false
A basin designed to hold surplus surface runoff, keeping it out of a stream is
A. a drainage basin. B. an oxbow lake. C. a retention pond. D. a delta.