Question

Assertion: The phloem sap moves towards the sink.

Reason: The process of loading at the source produces a hypotonic condition in the phloem.

• A. if both A and R are true and R is the correct explanation of A
• B. if both A and R are true but R is not the correct explanation of A
• C. if A is true but R is false
• D. if both A and R are false.

Answer 1

The correct option is C

if A is true but R is false

Vein loading of the phloem at the source causes the source to become hypertonic. Thus water flows in and raises the hydrostatic pressure. This pressure helps in translocation towards the sink.