Final answer:
Apical meristems are located at or near the tip of plant shoots and roots, and they produce three types of primary meristems.
Step-by-step explanation:
Apical meristems are located at or near the tip of plant shoots and roots. These tissues exhibit primary growth (increases in length) and produce three types of primary meristems: protoderm (produces the epidermis), ground meristem (differentiates into the primary xylem), and procambium (produces all the primary tissues other than the epidermis and vascular tissues).