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valkas [14]
3 years ago
9

More than 1.5 million species of animals have been described, yet all of them have DNA that is made of the same building blocks.

This is evidence that all animals have a _________ ancestor.
Biology
1 answer:
Amanda [17]3 years ago
3 0

Answer:

common or single is the answer

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Answer:

Action potentials travel along the axon.

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