Question

Water in adjacent xylem moves into the phloem by the process of

• A. Osmosis
• B. Facilitated diffusion
• C. Active transport
• D. Simple diffusion

Answer 1

The correct option is A Osmosis

Water in adjacent xylem moves into the phloem by the process of osmosis (diffusion of a solvent through a semipermeable membrane from a region of lower concentration to a region of higher concentration).

As osmotic pressure builds the phloem sap will move to areas of lower pressure.

Facilitated diffusion is the passive movement of molecules along the concentration gradient with the help of membrane proteins. It is a selective process, i.e., the membrane allows only selective molecules and ions to pass through it.

Active transport invloves the transport against the concentration gradient using energy.

Simple diffusion is the movement of the molecules from a region of its higher concentration to a region of its lower concentration along the gradient.