All life can be divided into _____ domains and _____ kingdoms
a. three; three
b. four; four
c. three; four
d. four; three
C
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Which substance would have the most difficulty entering a water lattice?
a. table salt (NaCl) b. a nonpolar molecule c. a sodium ion d. a proton (H+) e. an electron
Which of the following is a two-carbon hydrocarbon with a single-carbon carbon bond?
a. ethene b. ethyne c. ethane d. ethylene
Biological wealth is the source of
a. food. b. medicine. c. ecotourism. d. economic opportunity e. all of these.
What was Lamarck's idea about how organisms changed?
A) He proposed that body parts changed as a result of extra use or disuse. B) He proposed that variations in populations were selected by the environment. C) He proposed that all organisms were unchanging over time. D) He proposed that humans evolved from fish.