In a stream that flows over limestone you would predict there would be higher
A) solute concentrations.
B) temperatures.
C) flows.
D) biodiversity.
A
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The presence of phenylpyruvic acid in urine is an indicator of ___________
A. heart disease D. spina bifida B. colon cancer E. more than one of these C. mental retardation
Which of the following is (are) found in many veins that help direct blood flow in one direction only: toward the heart?
A) lymph nodes B) pericardium C) myocardium D) valves
A trait that serves one purpose today, but evolved under different selective conditions:
a. is called an exaptation. b. is called an adaptation. c. explains the match between an organism and its environment. d. A and C. e. B and C.
Without proofreading, the rate of errors in DNA replication in bacteria is as high as about one for
every ____ nucleotides assembled.
a. 10 to 100 b. 100,000 to 1,000,000 c. 1000 to 10,000 d. 10,000,000 to 100,000,000 e. 100,000,000 to 1,000,000,000