O LevelBiologyCambridgeTopic Questions6. Plant Nutrition6.2 Leaf Structure

Leaf Structure (Cambridge O Level Biology)

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The diagram below shows a section through a leaf. 

Which cell type would have the highest concentration of oxygen on a bright, sunny day?

6-q7-cross-section

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The diagram below shows a cross-section through a leaf as seen under a microscope.

picture14

In which part of the leaf would the concentration of carbon dioxide be lowest on a warm, sunny day?

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The average number of chloroplasts found in four different types of cell from the leaf of a plant are shown in the bar chart below.

picture5

What are the names of the four types of cell?

  1 2 3 4
A spongy mesophyll cell epidermal cell palisade mesophyll cell guard cell
B palisade mesophyll cell guard cell spongy mesophyll cell epidermal cell
C epidermal cell spongy mesophyll cell palisade mesophyll cell guard cell
D palisade mesophyll cell spongy mesophyll cell guard cell epidermal cell

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21 mark

What describes the upper cuticle of a leaf?

  • a permeable layer allowing water to enter the leaf

  • a single layer of cells containing many chloroplasts

  • a single layer of transparent cells allowing light to enter the leaf

  • a thin non-cellular layer preventing water loss from the leaf

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