SL Content Statements

• B3.1.7

  Adaptations for gas exchange in leaves
  

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  Leaf structure adaptations should include the waxy cuticle, epidermis, air spaces, spongy mesophyll, stomatal guard cells and veins.
  

• B3.1.8

  Distribution of tissues in a leaf
  

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  Students should be able to draw and label a plan diagram to show the distribution of tissues in a transverse section of a dicotyledonous leaf.
  

• B3.2.9

  Distribution of tissues in a transverse section of the stem of a dicotyledonous plant

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  AOS: Students should be able to draw plan diagrams from micrographs to identify the relative positions of vascular bundles, xylem, phloem, cortex and epidermis. Students should annotate the diagram with the main functions of these structures.
  

• B3.2.10

  Distribution of tissues in a transverse section of the root of a dicotyledonous plant
  

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  AOS: Students should be able to draw diagrams from micrographs to identify vascular bundles, xylem and phloem, cortex and epidermis.