PCAT Review Questions - Pharmacy College

Answer: D, The transport tissues in vascular plants are the xylem and the phloem. The roots serve to absorb and store nutrients.

Key Takeaway: The xylem’s main function is to transport water and nutrients absorbed by the roots to the stem and leaves. The phloem serves to transport organic materials from the leaves to the roots for storage. The xylem is composed mostly of dead cells and transports water and nutrients via processes that do not require energy. The phloem is composed of living cells that transport sap, which is a water-based substance that is rich in photosynthetic sugars.