A variety of microorganisms live in the human digestive tract, especially in the small intestine. Their actions aid in digestion, and they help synthesize essential vitamins. What best describes the relationship between a human and the intestinal microorganisms?
A. parasitic symbiosis, because the microorganisms live on food that the human provides
B. mutualistic symbiosis, because all of the species benefit from the relationship
C. predator/prey, because the microorganisms live on food that the human provides
D. decomposition, because the bacteria live on dead or decaying organic matter
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A variety of microorganisms live in the human digestive tract, especially in the small intestine. Th...
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