Theory question 101
Structure of Flowering Plants(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.
Show the model answer
(a)(i) Photosynthesis (making food); transpiration; gaseous exchange through stomata; respiration; storage of food or water in some plants; excretion of waste (e.g. in falling leaves); vegetative propagation in some plants.
(ii) Any three with example: tendrils – Gloriosa, garden pea; spines – cactus (Opuntia), Euphorbia; storage (fleshy) leaves – onion; scale leaves – onion, ginger; insect-catching leaves – pitcher plant (Nepenthes), sundew, bladderwort; hooks – Bignonia; leaves for vegetative propagation – Bryophyllum.
(b) Diagram 8–10 cm of the carpel/pistil, title given, labels on ruled guidelines: stigma, style, ovary, ovule, ovary wall, receptacle (and placenta).
(c) Any three: Hibiscus, flamboyant (Delonix), cowpea, Crotalaria, Clitoria, sunflower, orchid, pride of Barbados.
Diagram: draw only the female part, large and labelled.