Chemotaxis (from chemo- + taxis) is the movement of an organism in response to a chemical stimulus. Somatic cells, bacteria, and other single-cell or multicellular organisms direct their movements according to certain chemicals in their environment.
It will be good for up to six months, in the vacuum seal, if stored in the refrigerator. If frozen in the vacuum seal, it can last for about 1 year. Once the sample is removed from the vacuum seal, it should not remain at room temperature for more than 18 hours. It will keep in the refrigerator, unsealed, for 30 days.
If properly sealed and stored, urine samples are good for testing  up to 24 hours after the sample given. The urine sample should be  in a sterile container within a sealed â¦plastic bag and stored in a  refrigerator. Making the world better, one answer at a time.