Cell differentitation is important because our body's need different type of cells to grow and also function
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Biotic factors of an ecosystem are all the living organisms that affect other organisms in an ecosystem and include animals, plants, microorganisms, dead organisms, and even animal waste. Example of biotic factors include: Grass as producers (autotrophs).
The skull is the large opening in the base of the occipital bone where the brain connects to the spinal cord