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