(a)(i) List the functions of a typical foliage leaf. (ii) Name three types of leaf modifications giving one example in each case. (b) Make a diagram 8 - 10c...
Question 1 Report
(a)(i) List the functions of a typical foliage leaf.
(ii) Name three types of leaf modifications giving one example in each case.
(b) Make a diagram 8 - 10cm long, of the female reproductive part of a flowering plant and label fully.
(c) Name three plants that are pollinated by insects.
Answer Details
(a)(i) Functions of a typical foliage leaf
- Manufacture of food by photosynthesis.
- Gaseous exchange (intake of carbon dioxide and oxygen) through the stomata.
- Loss of water vapour by transpiration, which helps in the upward pull of water.
- Storage of food and water in some leaves.
(a)(ii) Three types of leaf modification with one example each
| Modification | Example |
|---|---|
| Tendril (for climbing/support) | Passion flower (or pea) |
| Spine (for protection/reduced water loss) | Cactus (or Opuntia) |
| Storage leaf (fleshy, for food/water storage) | Onion (bulb scale leaves) or Aloe vera |
(Also acceptable: insect-trapping leaf - pitcher plant; bract - Bougainvillea.)
(b) Diagram of the female reproductive part of a flowering plant
The female part is the pistil (carpel/gynoecium). A clear drawing (8-10 cm) should show and label, from top to bottom: the stigma (sticky, receives pollen); the style (stalk connecting stigma to ovary); and the swollen ovary cut to show the ovules attached to the placenta by the funicle, with the micropyle and ovule wall (integuments) indicated.
(c) Three plants pollinated by insects
- Hibiscus (flamboyant/showy flower).
- Flamboyant (Delonix regia).
- Crotalaria (or sunflower, Bougainvillea, Ixora).
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