The visual change in color allows for {HEAD ~ easier detection} and visualization of {TAIL ~ the growing colonies} 
of
The visual change in color allows for { HEAD ~ easier detection } and visualization of { TAIL ~ the growing colonies }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL