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