Arrange the following tissues,organs,chemicals,and flows in the correct cyclical steps in the bulk flow of phloem sap.
i.sieve tube
ii.xylem vessel
iii.sucrose in leaf (source)
iv.sucrose in root (sink)
v.bulk flow by negative pressure
vi.bulk flow by positive pressure

Question

Quizplus · Accepted Answer

The correct sequence for the bulk flow of phloem sap starts with the production of sucrose in the leaf (source), then moves to the sieve tube where the sucrose is loaded, creating a high osmotic pressure that drives the bulk flow by positive pressure towards the sink (such as the root), where sucrose is offloaded. Xylem vessels and negative pressure are involved in water transport, not directly in the bulk flow of phloem sap.

Arrange the Following Tissues,organs,chemicals,and Flows in the Correct Cyclical Steps