When a group of cells work together to form specific tasks for specific things
Like heart cells, or muscle cellss - they all have specific jobs to do
Like heart cells, or muscle cellss - they all have specific jobs to do
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It is the idea that in a multicellular organism, different cells "specialize" to perform different functions. This occurs by changing the patterns of genes expressed in different cells.
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when cells clump together and do 'specialized things', ie: kidney cells, heart cells etc