| 11. | Once stained with hematoxylin and viewed through a microscope, growth rings are apparent.
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| 12. | Lee studied the growth of fish using the growth rings on their scales.
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| 13. | Park Superintendent Mike Gordon said cross sections displaying the growth rings would be made.
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| 14. | The most commonly used techniques involve counting natural growth rings on the opercular series.
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| 15. | Environment affects the size of the first growth ring.
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| 16. | Old wood will show its age by the number of growth rings in an inch.
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| 17. | It was widely known that large dinosaur bones displayed growth rings, much like tree rings.
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| 18. | Other indicators of past climate include the presence of tropical species, coral growths rings, etc.
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| 19. | Where there is little seasonal difference growth rings are likely to be indistinct or absent.
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| 20. | Cores on very old trees give information about their growth rings without destroying the tree.
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