âº a large bag used to carry things on your back, used especially by people who go camping or walking: It's a frame backpack with a belt and padded shoulder straps. Thesaurus: synonyms and related words. Containers for carrying personal possessions. attachÃ© case. baggage.
Protists and other single celled organisms move by either the use of Cilia, fagellae or by pseudopodia.Cilia are short hair-like structures which help the organism move with a wave like motion there are usually many over the animal's surface. Flagellae are single whip like organelles which propel the organism.rotists and other single celled organisms move by either the use of Cilia, fagellae or by pseudopodia.
Motion can be achieved by one of three mechanisms. Most motile bacteria move by the use of flagella, rigid structures 20 nm in diameter and 15-20 Âµm long which protrude from the cell surface, e.g. the Chromatium cells in the video. In some bacteria, there is only a single flagellum â such cells are called monotrichous.