Examlex
Few men over age 50 can father children.
Microscopic Organisms
Tiny life forms, often single-celled, that can only be seen with the aid of a microscope.
Limestone
A sedimentary rock composed primarily of calcite or dolomite, widely used in construction and manufacturing.
Calcium Carbonate
A naturally occurring compound found in rocks, shells, and marine organisms, used widely in the manufacturing and construction industries.
Microorganisms
Microorganisms are microscopic living organisms, including bacteria, viruses, fungi, and protozoa, that can exist as single cells or cell clusters.
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