January 2009
World Book Science Dataset;1/1/2009, p1
Reference Entry
Globigerina, a genus of marine protozoans (one-celled organisms). The globigerina resembles the amoeba in structure, but has a spiny, multichambered shell composed of calcium carbonate. The shell contains pores through which pseudopodia protrude. The pseudopodia are extensions of cytoplasm the globigerina uses for locomotion and for collecting food. The main food of globigerinas is plankton.


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