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When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection
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Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere
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What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures
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Drag each label to the correct location on the chart. match the function to the type of tissue
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Which animal is the most distant relative to the others
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