One significant difference between roots and stem is that
-
A.
Branch roots originate in the pericycle while stem do not -
B.
Stems are always bove the ground while root are always below the ground -
C.
Stems are positively geotropic while roots are negatively geotropic -
D.
Stem are sometime used for storage while roots are never used -
E.
Stems grow in both length and circumference while root grow only in length