Fluid at a temperature of [infinity] t[infinity] flows over a surface that is maintained at a temperature of ts. the temperature of the fluid that is in contact with the surface is

a- all cells come from pre-existing cells

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

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answer///multiple alleles;