Which of the following are examples of macroevolution?
A. Mass extinctions that wipe 50% or more of living species
B. The evolution of novel biological features
C. The creation of new species
D. All of the above are examples of macroevolution
Answer: D
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Suppose that in studies of genes on the same chromosome you find the following recombination frequencies: Why is the total distance between a and b less than the distance between a and c plus the distance between c and b?
a. a and b are not linked b. the distances were calculated incorrectly c. b is in between genes a and c d. double crossovers between a and b decrease recombinants e. all three genes encode the same trait
Mitochondria use inspired oxygen as an electron acceptor in the process known as:
a. pulmonary ventilation. b. cellular respiration. c. external respiration. d. internal respiration. e. anaerobic respiration.
Which of the following is true concerning saturated fatty acids?
A) They are the predominant fatty acid in corn oil. B) They have double bonds between the carbon atoms of the fatty acids. C) They are usually liquid at room temperature. D) They are usually produced by plants. E) They have a higher ratio of hydrogen to carbon than do unsaturated fatty acids.
Which body region is protected by fatty acids, acidic pH, lactic acid, and a tough cell barrier with its own normal flora?
A. skin B. eyes C. respiratory tract D. urinary tract E. digestive tract