Study specimens C, D, E, F,G and H carefully and use them to answer questions 2a to 2c
(a) Name the fruit types of specimens C,D,E,F.G, and H.
(ii) identify the type or placentation found in 2. C, D, E, F, G and H.
(iii) Describe briefly how specimen D is dispersed.
(c) in a tabular form state four structural differences between specimens G and H.
Explanation
(a) Types of fruit: C- Berry/hesperidium. D-Capsule. E-Legume/Pod. F-Cypsela. G Berry/hesperidium. H-Drupe.
(ii) Types of placentation with reasons: Specimen C Pepper - Axile - Ovules are attached to central placenta.
E Beans pod -Marginal - Ovules are arranged in a single row at the margin of an ovary.
G Orange-Axile- Ovules are attached to central placenta.
(b)(i) Modes of dispersal: C/ Pepper - Animal/Man D/Castor oil Explosive mechanism. E/ Bean pod - Explosive mechanism.
F/ Tridax -Wind G/ Orange -Animal/Man. H/Coconut- Water/Man.
(ii) Dispersal of specimen D/Castor oil fruit: - The fruit matures ripens and dries up. Tension is set up in its fruit wall. - Due to uneven drying of the fruit wall/pericarp dries unevenly. - Fruit splits with explosion along weak lines. - Seeds are scattered.
(c) Differences between Specimens G and H
Specimens G/O Orange: Epicarp and mesocarp fused; Endocarp is succulent/fleshly/soft; Many seeds; Many chambers in fruit; Mesocarp is membranous/leathery; Axile placentation;
Specimen H/Coconut: Epicarp and mesocarp separate; Endocarp is hard/stony; One seed; Only one chamber in fruit; Mesocarp fibrous; Parietal placentation.