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What (who) is tropism$85390$ - definition
RANGE OF CELLS AND TISSUES OF A HOST THAT SUPPORT GROWTH OF A PARTICULAR VIRUS OR BACTERIUM
Tissue Tropism; Viral tropism
Tropism
![Daisies (''[[Bellis perennis]]'') facing the sun after opening in the morning showing [[heliotropism]]](https://commons.wikimedia.org/wiki/Special:FilePath/A Gaenseblume4.JPG?width=200 "Daisies (''[[Bellis perennis]]'') facing the sun after opening in the morning showing [[heliotropism]]")
![''[[Phycomyces]]'', a fungus, exhibiting phototropism](https://commons.wikimedia.org/wiki/Special:FilePath/Phycomyces3.JPG?width=200 "''[[Phycomyces]]'', a fungus, exhibiting phototropism")
![Baia, Italy]]](https://commons.wikimedia.org/wiki/Special:FilePath/Upsidedown-tree.JPG?width=200 "Baia, Italy]]")
MOVEMENT OF AN ORGANISM, OR PART OF AN ORGANISM, IN RESPONSE TO AN EXTERNAL SOURCE OF STIMULUS, USUALLY TOWARD OR AWAY FROM IT.
TROPISM
A tropism is a biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus. In tropisms, this response is dependent on the direction of the stimulus (as opposed to nastic movements which are non-directional responses).
Tropism
MOVEMENT OF AN ORGANISM, OR PART OF AN ORGANISM, IN RESPONSE TO AN EXTERNAL SOURCE OF STIMULUS, USUALLY TOWARD OR AWAY FROM IT.
TROPISM
·add. ·noun Modification of the direction of growth.
tropism
MOVEMENT OF AN ORGANISM, OR PART OF AN ORGANISM, IN RESPONSE TO AN EXTERNAL SOURCE OF STIMULUS, USUALLY TOWARD OR AWAY FROM IT.
TROPISM
['tr??p?z(?)m, 'tr?p-]
¦ noun Biology the turning of all or part of an organism in response to an external stimulus.
Origin
C19: from Gk tropos 'turning' + -ism.
Wikipedia
Tissue tropism
Tissue tropism is the range of cells and tissues of a host that support growth of a particular pathogen, such as a virus, bacterium or parasite.
Some bacteria and viruses have a broad tissue tropism and can infect many types of cells and tissues. Other viruses may infect primarily a single tissue. For example, rabies virus affects primarily neuronal tissue.
