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BIOLOGY

JAMB 2003 - Question 17

Biology 2003 JAMB Past Questions - Question 17: The experiment is used to demonstrate that

use the diagram below to answer the questions 17 and 18

The experiment is used to demonstrate that

A: plants lose water through guttation

B: transpiration occurs through the leaves

C: water is necessary for photosynthesis.

D: leaves are important to photosynthesis.

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Correct Answer

Explanation

The leafy shoot has stomata for stomatal transpiration. The lost water is seen as droplets on the inner lining of the bell jar. This is not seen in the leafless shoot. In option A, loss of water through gutation occurs in plants during the rainy season when the plants absorb more water that can be lost through transpiration. The excess water is lost through the edges or margins of the leaves which bear specialised glands called hydathodes. This is called gutation