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  1. Why do plants store some of the sugar they make as starch?

    (Marks available: 2)

    Answer

    Answer outline and marking scheme for question: 1

    Plants could use starch or glucose. Starch is insoluble, while glucose is soluble.

    This means that if starch is used, less water is required to keep its food stored.

    (Total = 2 marks)

  2. What 4 things might affect the rate of photosynthesis?

    (Marks available: 4)

    Answer

    Answer outline and marking scheme for question: 2

    Amounts of...

    • water
    • carbon dioxide
    • sunlight
    • temperature

    (Total = 4 marks)

  3. How do plants stop themselves drying out?

    (Marks available: 2)

    Answer

    Answer outline and marking scheme for question: 3

    They close their stomata.

    The guard cells lose water and become flaccid.

    (Total = 2 marks)

  4. Have a look at this diagram of a small section of a leaf:

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    Name the regions A to D.

    (Marks available: 4)

    Answer

    Answer outline and marking scheme for question: 4

    A is a Palisade Cell

    B is a Guard Cell

    C is a Stoma

    D is Air Space

    (Total = 4 marks)