Which statement best describes the difference between xylem and phloem?
a
Xylem transports water and nutrients in the plant, and phloem transports water and sugar.
b
Xylem cells are thin-walled and tubular, and phloem cells are thick-walled and strengthened by lignin.
c
Xylem tissue is found in the growing parts of plants, and phloem is found on the outer part of plants.
d
Xylem cells make up vascular tissue, and phloem cells make up ground and dermal tissue.