The plural and singular form of measles is still measles
Measles for plural as well as for singular...
Explanation:apparently 1,2,3 and 5's singular forms are simply taking out the -s or -es. but for species, the word can refer to both singular and plural.
The first 3 are pretty self-explanatory, remove the s/es from them and you get their singular form. But the two is a little bit harder, Species is both singular and plur and the singular word for stresses is stress.
bacterium is the singular form of bacteria
it its the singular of bacteria
answer: too bored
cause its too boring sometimes ang and more pages
it means she/he can bully the ugly name thats why she/he bully