Phototaxis is a kind of taxis, or locomotory movement, that occurs when a whole organism moves towards or away from stimulus of light. This is advantageous for phototrophic organisms as they can orient themselves most efficiently to receive light for photosynthesis.
The Urine Culture Test measures the level of bacteria in the urine. *Price may vary by location â contact your local ANY LAB TEST NOWÂ®. Test results are generally available within 24 â 72 business hours after the specimen is collected. A bacterium known as Escherichia coli (E. coli) causes the majority of lower urinary tract infections (UTIs).
Casual or First Time Smokers: Urine tests performed on marijuana users 1 to 4 days after smoking are found to return a positive result more often then not. It is possible to receive negative test results at the end of the fourth day or later depending on the aforementioned factors.