Biology 2nd Edition by Robert Brooker, Eric Widmaier ,Linda Graham ,Peter Stiling

تمرين 6

The versatility of carbon to serve as the backbone for a variety of different molecules is due to
A) the ability of carbon atoms to form four covalent bonds.
B) the fact that carbon usually forms ionic bonds with many different atoms.
C) the abundance of carbon in the environment.
D) the ability of carbon to form covalent bonds with many different types of atoms.
E) both a and d.