Answer:
On a biological level, the main difference is that bacteria are free-living cells that can live inside or outside a body, while viruses are a non-living collection of molecules that need a host to survive.
While most carnivores hunt and kill their prey, scavengers usually consume ... Herbivores, or organisms that consume plants and other autotrophs, are the second trophic level. ... They keep an ecosystem free of the bodies of dead animals.
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The brain sends messages via the spinal cord to peripheral nerves throughout the body that serve to control the muscles and internal organs. The somatic nervous system is made up of neurons connecting the CNS with the parts of the body that interact with the outside world.
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