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Some living organisms are only one cell, or unicellular. Things like bacteria and amoebas are single cell organisms. ... Because cells are able to differentiate and perform different tasks, multicellular organisms can become very complex. For example, red blood cells can carry oxygen throughout the body.
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B,D I think plz let me know if this is wrong or that If it helps thanks :)
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Gave them a lot of resources like water, good farming soil, and was believed it was a Sacred RIver for the Egyptians.
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