An enzyme. An enzyme is a protein speed up a biochemical reaction. It’s a catalyst.
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B. distance and mass because as distance increases, the gravitational pull decreases and when it decreases, the gravitational pull increase. Also the mass increases, so does the attraction and opposite if it decreases.
The answer is mutualism. Not only does the bacteria get food, we are helped with digestion! I hope this helps ^^
Answer:
due to natural selection , if the predator of the gazelle declines, then the prey the gazelles will increase since there isn't many cheetahs killing them anymore.
the second should be competition, since there will be more gazelles needing to eat.
Explanation: