1) What is the main function of a leaf? a) To absorb water b) To store food c) To carry out photosynthesis d) To protect the stem 2) What are stomata? a) Pores on the underside of a leaf b) Tubes that carry water c) Cells that contain chlorophyll d) Roots of the plant 3) What gas do plants take in through the stomata? a) Oxygen b) Water vapour c) Carbon dioxide d) Helium 4) What is released during photosynthesis? a) Glucose b) Oxygen c) Nitrogen d) Carbon dioxide 5) What is the function of chloroplasts? a) To store starch b) To carry out photosynthesis c) To control the cell d) To absorb water 6) Why are most leaves flat and thin? a) To attract insects b) To help wind blow them away c) To trap more sunlight and allow gases to move easily d) To stop water evaporating 7) Where in the leaf are most chloroplasts found? a) Guard cells b) Spongy layer c) Xylem vessels d) Palisade layer 8) What is the job of the spongy mesophyll layer? a) To protect the leaf b) To allow gases to diffuse through air spaces c) To reflect sunlight d) To support the stem 9) What do guard cells control? a) The shape of the leaf b) Water movement through xylem c) The temperature of the leaf d) The opening and closing of stomata 10) What feature helps prevent water loss from the leaf? a) Palisade cells b) Thin shape c) Waxy cuticle d) Spongy layer

Leaf Structure CFU

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