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igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

b) the inside picture would look at a very high temperature in a very low ph

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.