Examlex
Blind-end invaginations of tonsil epithelium that trap bacteria and particulate matter.
Gravel
Coarse granular material, consisting of rounded or angular fragments, often used in construction and landscaping.
Transgression
The advance of the sea across the land and the evidence of such an advance.
Regression
The retreat of the sea from land areas and evidence of such withdrawal.
Sandstone
A sedimentary rock composed mainly of sand-sized mineral particles or rock fragments.
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Q89: Identify the letter that indicates the gland