Test (biology)

In biology, a test is the hard shell of some spherical marine animals and protists, notably sea urchins and microorganisms such as testate foraminiferans, radiolarians, and testate amoebae. The term is also applied to the covering of scale insects. The related Latin term testa is used for the hard seed coat of plant seeds.

Part of a series related to
Biomineralization
General
Exoskeletons (shells)
Endoskeletons (bones)
Teeth, scales, tusks etc
Calcification
Silicification
Other forms
Related
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