Again, medication may be the reason your urine changes color. It could also mean there is blood in your urine, either from vigorous exercise or due to an infection. If you're urine doesn't clear up in 24 hours, go see a doctor.
The three-domain system is a way for classifying biological organisms. This classification system distinguishes between eukaryotic organisms, organisms which have cells which include a nucleus, and two types of prokaryotic organisms, organisms with cells which lack a nucleus.Over the years, scientists have developed several systems for the classification of organisms.he three-domain system is based on the traditional, and most accepted, six-kingdom system but divides the prokaryotae into two domains, leaving the remaining eukaryotic kingdoms in the third domain.
In the late 1970s, Dr. Carl Woese and his associates at the University of Illinois rocked the scientific community with the discovery of a new group of organisms. Once thought to be part of the eubacteria, or bacteria domain, the archaea's cellular makeup warranted the creation of a third type--or domain--of life. Other People Are Reading.