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time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life Archaeozoic , Archaeozoic aeon , Archean , Archean aeon , Archean eon , Archeozoic , Archeozoic eon
reproduction of some unicellular organisms (such as yeasts) by growth and specialization followed by the separation by constriction of a part of the parent budding
unicellular green algae that reproduce by spores Chlorococcales , order Chlorococcales
type genus of Chlorococcales; unicellular green algae occurring singly or in a layer on soil or damp rock Chlorococcum , genus Chlorococcum
hairlike projection from the surface of a cell; provides locomotion in free-swimming unicellular organisms cilium
unicellular algae Desmidiaceae , family Desmidiaceae , planktonic algae
microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica diatom
unicellular or colonial biflagellate free-swimming flagellates family Volvocaceae , Volvocaceae
reproduction of some unicellular organisms by division of the cell into two more or less equal parts fission
nonmotile unicellular green algae potentially important as source of high-grade protein and B-complex vitamins genus Chlorella
in most modern classifications, replacement for the Protista; includes: Protozoa; Euglenophyta; Chlorophyta; Cryptophyta; Heterokontophyta; Rhodophyta; unicellular protists and their descendant multicellular organisms: regarded as distinct from plants and kingdom Protoctista , Protoctista
division of lower plants comprising unicellular and biflagellate algae that form starchy compounds phylum Pyrrophyta , Pyrrophyta
plantlike flagellates containing chlorophyll; often considered unicellular algae Phytomastigina , subclass Phytomastigina
photosynthetic or plant constituent of plankton; mainly unicellular algae phytoplankton
unicellular organisms having many characteristics of typical algae plantlike flagellate
unicellular organism having cells lacking membrane-bound nuclei; bacteria are the prime example but also included are blue-green algae and actinomycetes and mycoplasma procaryote , prokaryote
any of the unicellular protists protoctist
any of diverse minute acellular or unicellular organisms usually nonphotosynthetic protozoan , protozoon
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