Question

46. Water moves into phloem cells by osmosis and creates an increased pressure

that pushes the sugar and water in the phloem to the rest of the plant. This
description of moving materials through the phloem is called
A. Phloem theory
B. Pressure difference
C. Pressure-flow theory
D. Active transport

Answer 1

A.

Step-by-step explanation:

A high concentration of organic substances, particularly sugar, inside cells of the phloem at a source, such as a leaf, creates a diffusion gradient (osmotic gradient) that draws water into the cells from the adjacent xylem. This creates turgor pressure, also known as hydrostatic pressure, in the phloem.