Standard Science Primary 5 Systems

Luke placed a celery stalk in a beaker of blue-coloured water. After a few hours, he cut a cross-section of the stalk. What would he observe?

A The whole stalk is blue.
B Small blue dots are visible in the inner part of the stalk.
C Only the leaves are blue while the stalk is green.
D Small blue dots are visible in the outer layer.
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Worked Solution

Step 1: Water travels through water-carrying tubes (xylem). Step [2-9]: In many stems like celery, these tubes are organized in bundles located towards the center. Step [2-9]: The blue dye marks these tubes, appearing as dots in a cross-section.

Correct answer: Small blue dots are visible in the inner part of the stalk.

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