(i) Cerebellum is the part of the brain which is responsible for: (a) Interpreting sensations. (b) Conducting reflexes in the body. (c) Maintaining posture and equilibrium. (d) Controlling thinking, memory and reasoning.   (ii) The mineral element essential for the clotting of blood is: (a) Iron. (b) Calcium. (c) Iodine. (d) Sulphur.   (iii) A plant is kept in a dark cupboard for about 48 hours before conducting any experiment on photosynthesis to: (a) Remove chlorophyll from the leaves. (b) Remove starch from the plant. (c) Ensure that no photosynthesis occurs. (d) Ensure that the leaves are free from starch.   (iv) The parts of the human ear concerned with hearing are: (a) Cochlea, ear ossicles and tympanum. (b) Semicircular canals, utricules and saccules. (c) Eustachian tube, tympanum and utricules. (d) Perilymph, ear ossicles and semicircular canals.   (v) During respiration, there is: (a) Gain in dry weight. (b) Loss in dry weight. (c) No change in weight. (d) All of the above depending on the type of respirable material.   (vi) Marine fish when thrown under tap water bursts because of: (a) Endosmosis (b) Exosmosis (c) Diffusion (d) Plasmolysis   (vii) Introduction of deadened or weak microbes into the body is termed: (a) Immunisation (b) Vaccine (c) Sterilisation (d) Vaccination   (viii) Duplicated chromosomes are joined at a point termed: (a) Centrosome (b) Centromere (c) Centriole (d) Chromatid