How do dead tracts appear in ground sections under different lighting conditions?

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Dentinal tubulesThick fibril bundles positioned perpendicular to the dentin surfaceDark when viewed with transmitted light and bright with reflected lightBright under transmitted light and dark under reflected light

Explanation

Dead tracts in ground sections are characterized by appearing dark or black under transmitted light and bright or white under reflected light, distinguishing them from other structures such as dentinal tubules or fibril bundles.