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.
Based on such RNA studies, Carl Woese thought life could be divided into three large divisions and referred to them as the three primary kingdom model or urkingdom model. In 1990, the name domain was proposed for the highest rank.