Fossil evidence suggests that these three animals can be classified in the same phylum, Chordata, but in three different

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

the answer is a) cell division.

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well the answer is 2!

acceleration = 18/3 = 6 m/s per second.

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-lavira: )