For a scientific theory to be valid, which of the following must be true?
a. it must be well...
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Out of the seven main animal groups (fish, mammals, birds, insects, reptiles, amphibians, and arachnids), how many contain members with internal backbones? a. 5 b. 3 c. 7 d. 1
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What process decreases the salinity of ocean water? decreased precipitationdecreased melting of glaciersincreased evaporationincreased runoff from rivers
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Which factor is difficult to assess in a cost-benefit analysis
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