The major barrier to both plant and animal inhabitation of land was ____
a. higher water temperatures
b. their inability to regulate body temperature
c. their methods of respiration
d. their methods of reproduction
e. lower land temperatures
d
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What crop developed 5,000 years ago and grows in standing water?
A) sugar B) rice C) bananas D) coffee E) none of the above
Many metallic mineral deposits such as copper, gold, lead, silver, tin, and zinc are related to igneous and associated ____ activity
A)metamorphic B)subducting C)hydrothermal D)transform fault E)sedimentary
Subjective judgments about complex environmental phenomena often lead to
A) the generation of new theories and groups of protestors. B) the generation of new laws. C) controversies and unclear conclusions and public confusion. D) government policies.
Which of the following alcohols is least soluble in water?
A) 1-pentanol B) 1-octanol C) 1-hexanol D) 2-propanol