Plant tissues (vascular development): Identify the origin tissue for the primary phloem. Full question: Primary phloem develops from which meristematic tissue during primary growth? Choose the correct option.

Given

• Target: Developmental origin of primary phloem.

Concept
During primary growth, the procambium (a primary meristem) differentiates into primary xylem and primary phloem. Secondary phloem arises later from vascular cambium during secondary growth.

Distractors
Vascular cambium → secondary tissues; pericycle → lateral roots; phellogen → periderm/cork, not phloem.

Final Answer
Procambium.