A plant with well-washed roots is placed in a beaker of wat…

Biology Transport in Plants ( Not In Syllabus ) Single Correct MCQ

Published on: August 21, 2026

A plant with well-washed roots is placed in a beaker of water diluted with red ink. The red colour travels up the stem and into the leaf veins. Which of the following should be the correct explanation of the uptake of red ink into the roots?

The red ink entered the root hairs by osmosis.

The molecules of red ink diffuse into the root hairs.

The membranes of the root hairs are destroyed and the red ink could enter.

The molecules of red ink passed from a region of low concentration to one of high concentration.

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