| http://www.w3.org/ns/prov#value | - energy from outside the cell11. a cell membrane to hold the parts together and separate the inside from the outside12. supplies of phosphorous, calcium, sodium, potassium and other inorganic elements, 13. chemical and physical conditions suitable for the accumulation and proper chemical combination and structural arrangements of all of these partsit is not simple, no matter how you look at it.quote
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