How is radial symmetry different from bilateral symmetry?

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  • Radial symmetry refers to symmetry of an organism from one side in which wherever you cut the organism in half from the center, then the organism will be symmetrical. An example of this could be a circular bacteria cell- no matter which side you cut it (as long as it passes throught the center) the organism will be symmetrical (as far as vague surface details are concerned).
    However bilateral symmetry refers to having symmetry on only one axis and through only one particular cross section. For example, in humans this would be a cut from the head to the groin- that is what is considered bilateral symmetry.
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