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BIOLOGY

JAMB 2009 - Question 13

Biology 2009 JAMB Past Questions - Question 13: The structure that controls loss of water vapour during transpiration is labelled

Use the diagram to answer questions 13 and 14

The structure that controls loss of water vapour during transpiration is labelled

A: I

B: II

C: III

D: IV

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Correct Answer

Explanation

A- It is a. waterproof, waxy cuticle found on the upper epidermis of a leaf.Option II is the substomatal chamber or intercellular air space which is indirect communication with the atmosphere through option IV which represents thestomafah pore used for gaseous exchange and elimination of ..excess water.Option 111 is the lower epidermis of a leaf.