Yeast, fruit flies, nematodes, mice or the small plant Arabidopsis have known genome i.e their entire genetic information is known to the scientific community, thus they are EASILY MODIFIED in genetic research.
Also, they are simple eukaryotes (having cells with defined nucleus) so they can explain the processes in the human eukaryotic cell during genetic research
Weather refers to short term atmospheric conditions while climate is the weather of a specific region averaged over a long period of time. Climate change refers to long-term changes.
There are two kinds of cells found in/on the human body that lacks nucleus
Red blood cells
Bacteria
Since the material observed under the microscope was scraped from under the finger nails and there was no indication of broken skin, it is likely that the observed cells are bacteria.
I'm not sure but I'm thinking its some kind of switching I mean if its some kind of code or DNA then ya switching like spreading its self to the other color