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What are the pathways that carry Carbon Dioxide rich blood called?
10 poir

Which of the following processes does the body not use protein to perform? a. repairing muscles b. producing hormones c. making hemoglobin d. creating amino acids

This is one popular brand of exercise machine

Which practice is harmful to the land? a. using animal waste as fertilizer b. composting with peels from commercial fruit c. throwing paint cans in the garbage d. cutting the lawn with a gas-powered mower