animal or plant group having natural relations

(biology) the major taxonomic group of animals and plants; contains classes

(biology) taxonomic group containing one or more families

the science that studies living organisms

arrange or order by classes or categories

assign to a class or kind

a former classification

photosynthetic bacteria found in fresh and salt water, having chlorophyll a and phycobilins; once thought to be algae: blue-green algae

characterized by the formation of pseudopods for locomotion and taking food: Actinopoda; Rhizopoda

heliozoans; radiolarians

creeping protozoans: amoebas and foraminifers

(biology) the major taxonomic group of animals and plants; contains classes

(biology) taxonomic group containing one or more families

the science that studies living organisms