If species A and B have very similar genes and proteins, what is probably TRUE? species A evolved independently of species B for a long period
species A and B share a relatively recent common ancestor
species A is older than species B
species A is younger than species B

b. to discover aspects of the natural world.

hopefully i .

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the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: