they are both the same things they are an animal with a backbone
organisms that are made up of one cell
Unicellular means one cell. . So naturally a unicellular organism such as plankton, would be unicellular. .
A unicelluar prokaryote doesn't hav ea membrane, while a unicelluar euryote has a cell membrane. ;) hope this helps -from an awesome smart person
Vertebrates are any animal or person that has a backbone ie. cats, dogs, humans.Invertebrates are animals without a vertebrate ie. snakes, sea snails
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