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The three main systems of government used today are unitary systems, federal systems, and confederate systems
Photosynthetic bacteria changed the Earth's atmosphere
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Biodiversity boosts ecosystem productivity where each species, no matter how small, all have an important role to play. For example, A larger number of plant species means a greater variety of crops. Greater species diversity ensures natural sustainability for all life forms.
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Is the Atmosphere always the same? Explain. No, it is Constantly changing w/ Gases Moving in and out of Living things, the Land and Water. ... They are Created when the Downward Force of Air is Greater than the Upward Force of Moving Air and Air Molecules.