AP BIOLOGY

Detailed explanation-1: -Xylem carries water and minerals from roots to upper parts of the plant (leaves) only in the upward direction.

Detailed explanation-2: -The transportation of water in the xylem takes place only from the roots to the leaves. Therefore, the movement of water and nutrients in the xylem is unidirectional. However, the movement of food in the phloem is bidirectional (both upward and downward).

Detailed explanation-3: -The xylem distributes water and dissolved minerals upward through the plant, from the roots to the leaves. The phloem carries food downward from the leaves to the roots.

Detailed explanation-4: -Answer: the statement(s) is (are) true about transport in plants : I. Beside water, xylem also transports amino acids and other substances.