The atomic number of an atom is
A. the number of neutrons in the atom.
B. the number of protons and neutrons in the atom.
C. the number of protons in the atom.
D. the number of protons and electrons in the atom.
E. None of these choices are correct.
Answer: C
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As an added safety precaution, low-acid, home canned foods should be
A. eaten with spoons. B. boiled at least 15 minutes before consumption. C. frozen for 1 hour before consumption. D. dried prior to eating.
Two F+ E. coli strains are co-cultured in the same flask. One is Strr Thr+ and the other is Genr Thr?. The culture is then plated on minimal media that is supplemented with gentamycin only (not threonine) and a few colonies grow. What sort of genetic exchange is most likely occurring?
A) transformation B) conjugation C) transduction D) electroporation
As K permeability increases, the permeability of the membrane to water ________
a. decreases. b. is unaffected. c. increases. d. falls to zero.
How has climate change altered the mountain pine beetle?
A) They are being outcompeted by the prairie pine beetle. B) They now have two generations per year. C) They have decreased the average elevation of their distribution. D) Their abundance has increased through lack of predators due to mismatched phenology.