Answer:
Explanation:
Most environments have many niches. If a niche is "empty" (no organisms are occupying it), new species are likely to evolve to occupy it. This happens by the process of natural selection. By natural selection, the nature of the species gradually changes to become adapted to the niche.
Fungi, bacterium
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I think you need more information like the force of gravity and the force of the three people. Once you combine the two, however, you should get the net force.
It is true but that’s not Physics
A motion where gravity is the only force acting upon it
