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phototaxis

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phototaxis /pho·to·tax·is/ (-tak´sis) the movement of cells and microorganisms in response to light.phototac´tic
pho·to·tax·is (ft-tkss)
n.
The movement of an organism or cell toward or away from a source of light.

photo·tactic (-tktk) adj.

phototaxis [fo″to-tak´sis]
taxis of cells and microorganisms under the influence of light. adj., adj phototac´tic.

phototaxis
the movement of cells and microorganisms under the influence of light.


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This ability is crucial for phototaxis - the swimming towards light exhibited by many zooplankton larvae.
In a study published by the British-based journal Nature, European scientists looked at the larvae of the marine ragworm Platyneris dumerilii to try to explain how plankton are able to do the phototaxis trick.
These included: the Flip Test-which measures the ability to reposition, the Circle Test-which measures the speed, the Cling Test- which measures the posterior leg strength and the Phototaxis Test.
 
 
 
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