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An index fossil. An index fossil's age is known, allowing scientists to know the relative age of other fossils based on their position relative to the index fossil. (Ex. If a fossil is deeper in the earth, it is older than the index fossil)

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An index fossil. An index fossil's age is known, allowing scientists to know the relative age of other fossils based on their position relative to the index fossil. (Ex. If a fossil is deeper in the earth, it is older than the index fossil)

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The relative refractive index tells the speed of light in a vaccum over the speed of light in medium.

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index fossils

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Relative power index

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Heat Index.

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Biology

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What must be true if unicellular organisms evolved into organisms in the domain Eukarya

An organism has the following traits unicellular can use photosynthesis contains DNA in the nucleus what kingdom does this most likely belong in

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