4. Take a beaker (jar or jug) with some water and put some drops of red or blue ink in it. Take a tender twig of any flowery plant with leaves and flowers, preferably white flowers, and put it in the beaker for 6 to 8 hours. What do you observe? For further examination cut across its stem and look for the presence of colored water. Explain your observations. (6 marks)
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Answer:
The observation will be the stem with colored water and patches of ink color on the leaves and flowers.
Explanation:
The mechanism behind this is the conduction of water by the stem against gravity. Xylem and its elements are involved in the conduction of water in plants. So, when the tender twig of any flowering plant with the leaves and flowers is put inside the jar of water (mixed with red/blue ink), it conducts the colored water in the stem and reaches the leaves and flowers. Hence, after 6-8 hours, colored water will be visible in the stem and red/blue batches will be visible on the leaves and flowers.
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Answer:
xylom help in the transport of water and food
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