Which of the following is NOT a characteristic of the Earth’s water cycles?
a. primarily a fresh water cycle
b. driven exclusively by wind energy
c. influenced by wind patterns
d. influenced by ocean currents
e. evaporation of water into lower atmosphere
ANSWER: b
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There are two main subgroups of primates: the wet-nosed primates (Strepsirrhini) and the dry-nosed primates (Haplorhini). Which of the following belong to the subgroup with a wet nose and a fixed upper lip?
1.apes 2.humans 3.lemurs 4.monkeys
What are the downsides of sweat as a cooling mechanism? What will be an ideal response?
Which of the following would be correctly classified as a protein?
A) cholesterol B) starch C) an enzyme D) cellulose
Why is the runoff from fertilized agricultural fields, even if free of pesticides, often harmful to the ecosystems of temperate lakes?
A) Fertilizer compounds create large hydrothermal vent communities that kill lake organisms. B) The runoff causes heavy growth of algae, which eventually die and decompose, causing oxygen depletion. C) Runoff water pools at the lake's bottom, where the fertilizer compounds react with materials in the sediment to form toxic substances. D) The runoff is acid, and acidification kills key lake organisms.