Oxygen is what animals need in order for Carbon Dioxide to be exhaled while breathing. This is part of what the Respiratory System does. Carbon also enters animals that are in contaminated environments such as living next to a factory or a polluted area.
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the correct answer is c.) Rodents and rabbits are most closely related to primates.
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Answer is A signal is sent down an exon within a nerve cell.
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the top of the pyramid because they are the predators of some animals
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