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Question
Explain the structure of a leaf with the help of a labelled diagram. (4 Marks)
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Solution
Leaves are vital to the survival of plants. They help plants in a variety of ways, including producing food and oxygen through photosynthesis, balancing water loss, regulating gas exchange, and transporting the products of photosynthesis.
A leaf has two main parts:
(1) Petiole- The stalk that supports a leaf in a plant and attaches the leaf blade to the stem. (1 Mark)
(2) Lamina(Leaf Blade)- The green flat part of a leaf that is specialized for photosynthesis. The lamina contains the following parts:
(i) Veins- The lines on the green flat part in a leaf that provide support for the leaf and transport both water and food.
(ii) Midrib- The central, thick, linear vein that runs along the length of a leaf is called midrib. (1 Mark)
(2 Mark)
A leaf has two main parts:
(1) Petiole- The stalk that supports a leaf in a plant and attaches the leaf blade to the stem. (1 Mark)
(2) Lamina(Leaf Blade)- The green flat part of a leaf that is specialized for photosynthesis. The lamina contains the following parts:
(i) Veins- The lines on the green flat part in a leaf that provide support for the leaf and transport both water and food.
(ii) Midrib- The central, thick, linear vein that runs along the length of a leaf is called midrib. (1 Mark)
(2 Mark)Suggest Corrections
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