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Life Science
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Which Embryo
Is Human
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The
visitor is challenged to select which of the displayed embryos is
human. Adult fish, chickens, dogs, and lizards don't look much like
humans. So why do these embryos look so much alike? The basic design
of all these animals is more similar than you might think. Since
all vertebrates (animals with backbones) evolved from a common ancestor,
the genetic information that guides their development is nearly
the same. That's why scientists can learn about human development
by studying other organisms—including zebrafish.
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