How many organisms can a ecosystem hold depends on the type of ecosystem.
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Answer:
Most of the energy in the Earth system comes from just a few sources: solar energy, gravity, radioactive decay, and the rotation of the Earth. Solar energy drives many surface processes such as winds, currents, the hydrologic cycle, and the overall climate system.
Explanation:
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Because depending on weather or not there is oxygen in the blood the flow and speed will be different from the heart because its coming from the direct source