JAMB Biology 1979 Question 49

One significant difference between roots and stem is that

1. A.branch roots originate in the pericycle while branch stems do not
2. B.stems are always above the ground while roots are always below the ground
3. C.stems are positively geotropic while roots are negatively geotropic
4. D.stems are sometimes used for storage while roots are never so used
5. E.stems grow in both length and circumference while roots grow only in length.