Test (biology)
Encyclopedia
A test is a term used to refer to the shell of sea urchin
s, and also the shell of certain microorganisms, such as testate foraminifera
and testate amoebae
.
Sea urchin
Sea urchins or urchins are small, spiny, globular animals which, with their close kin, such as sand dollars, constitute the class Echinoidea of the echinoderm phylum. They inhabit all oceans. Their shell, or "test", is round and spiny, typically from across. Common colors include black and dull...
s, and also the shell of certain microorganisms, such as testate foraminifera
Foraminifera
The Foraminifera , or forams for short, are a large group of amoeboid protists which are among the commonest plankton species. They have reticulating pseudopods, fine strands of cytoplasm that branch and merge to form a dynamic net...
and testate amoebae
Testate amoebae
Testate amoebae are single-celled protists partially enclosed in a simple test .They are commonly found in soils, leaf litter, peat bogs and near/in fresh water....
.