Biology for IGCSE & O level - Transport In Plants (Section 4 - No. 5)
What is the purpose of applying dye, such as red dye, to the cut stem of a celery stalk in the investigation shown?
To make the celery stalk more attractive.
To observe the pathway of water transport in the xylem.
To change the taste of the celery.
To kill any bacteria in the celery.
Explanation
The dye is used as a visual indicator to trace the path of water movement within the xylem.
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