Which of the following body parts is surrounded by a mucous membrane?
A. cavities of freely movable joints
B. abdominal cavity
C. heart
D. ovaries
E. tubes of the digestive system
Answer: E
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A student drops his notes, and his papers scatter. The fact that the papers scatter and do not remain neatly stacked is an illustration of
A) the first law of thermodynamics. B) the second law of thermodynamics. C) an increase in entropy. D) both choices A and B E) both choices B and C
The first amino acid in a growing polypeptide chain is _____
a. methionine b. valine c. lysine d. phenylalanine e. glycine
Less-developed countries are most likely to be characterized by:
a. low fertility rates. b. high GNI PPPs. c. low doubling times. d. high use of contraception. e. high infant mortality rates
Some bacteria have been found to have much higher rates of mutation than other members of their population; they are termed "mutators." What do you think is the most likely reason for their higher rates of mutation?
A. They are incapable of bacterial transformation. B. Their DNA polymerase has compromised 5' to 3' polymerase function. C. All choices are equally likely to lead to higher rates of mutation. D. They have much smaller genomes than regular bacteria. E. Their DNA polymerase has compromised 3' to 5' exonuclease function.