When fish breathe, their gills exchange oxygen and
a. carbon dioxide
c. carbon monoxi...
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Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels
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During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming
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Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.
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In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity
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