Which of the following is a radical??
A. H2O
B. H
C. OH
D. O

This is the amino acid cysteine. circle the amine group, put a box aroundthe carboxylic acid group and use a different colored pencil/pen to circle the sidechain (r group). h o | ||nh2— c- c-oh | ch2 | sh

Discuss the functions of epithelial connective nerviud and muscular tissues

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above