| 11. | The radial symmetry is characteristic of echinoids generally, including the ancestors of sand dollars.
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| 12. | One branch developed into strangely dorsoventrally flattened forms with partial radial symmetry and metallic exoskeletons.
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| 13. | Note radial symmetry due to simple diffusion.
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| 14. | The bodies of adult sand dollars, like those of other echinoids, display radial symmetry.
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| 15. | The term ogee is used due to the ogee shape in radial symmetry around the centre.
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| 16. | The radial symmetry of each flower is five-fold, with the flowers usually bisexual, rarely unisexual.
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| 17. | Native life on Sergyar seems to have a general radial symmetry, with most lifeforms having six limbs or appendages.
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| 18. | Each flowering head of " B . alba ", which is small, appears in radial symmetry.
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| 19. | Because of its inherent limitations, throwing can only be used to create wares with radial symmetry on a vertical axis.
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| 20. | See the figure, in which time is running vertically and we use the radial symmetry to suppress one spatial dimension.
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