(a) (i) Distinguish between hormonal co-ordination in plants and animals. (ii) Which part of the brain is…
(a) (i) Distinguish between hormonal co-ordination in plants and animals.
(ii) Which part of the brain is responsible for –
(1) intelligence
(2) riding a bicycle
(3) vomiting
(4) controlling hunger
(iii) How is brain and spinal-cord protected against mechanical injuries ?
Solution
(a)
(i) Table — Hormonal coordination in Plants vs Hormonal coordination in Animals:
Plants: By simple diffusion; No specialised glands involved.
Animals: Transported through blood to the target organ; Hormone released by Endocrine glands.
(ii) (1) Cerebrum/forebrain,
(2) cerebellum/hindbrain
(3) medulla/ hindbrain
(4) hypothalamus/forebrain.
(iii) Brain – Bony box/skull/cranium/fluid filled balloon in skull,
Spinal cord – Backbone/Vertebral column.