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Cetacea, phylum Arthropoda, phylum Cnidaria
multi-cellular
Community.
scientists classify organisms into groups based on internal and external features.
Vertebrates are divided into 5 groups to put similar organisms together. The groups are mammals, amphibians, reptiles, fishes and birds. Mammals and birds are warm-blooded while reptiles, fishes and amphibians are cold-blooded.
different groups of organisms on number of cell?
There are many things which determine an organism's classification. In most cases features, physical traits and behavior patterns are used for classification.
Vertebrate organisms are organisms that have a spine. The five groups of vertebrate organisms are mammals, birds, amphibians, fish and reptiles.
System
Woese showed that prokaryotes actually can be divided into two groups-Bacteria and Archaea
Yes, mammals are divided into many sub-groups.