4.4.3 Biology Paper 3 (231/3)
1. (a) (i) Bubbles / gas formed/effervescence/foam/frith;
lime water turns white/white ppt/milky/cloudy;
(2 marks)
(ii) Gas produced is carbon (IV) Oxide/C02/carbon dioxide;
which reacts with lime water to form a white precipitate/calcium carbonate/ insoluble sent;
(2 marks)
(iii) Respiration / anaerobic respiration / fermentation/ aerobic respiration; (1 mark)
(iv) Respiration
(v) To provide optimum temperatures; for enzymes activity/action/working/ reaction;
(i)
(ii) X400; (eye piece lens x high objective lens) (1 mark)
(iii) Yeast; (1 mark)
2. (a) (i) Angiospermatophyta/Angiospermae; (1 mark)
(ii) E – veins on leaves / flowers / seeds;
F – narrow / parallel veined leaves.
LEAF E
Opposite
LEAF G
Alternate;
(b) (i)
(iii)Pricky/thorny/spiny/spines Smooth/hairy;(4 marks)
Woody / hard Herbacious / soft
Green / Grey Purple;
Non-succulent Succulent/juicy fleshy
Max. (5 marks) (2 marks)
(m) Pricky/thorny/spiny: for protection against brosers/herbivourous/animals; Woody/hard: for mechanical support;
. (a) (i) A
(ii) Presence of scapula/shoulder blade;
Presence of Olecranon process/ulna/radius/humerus
(b) J Radius
K Femur
M Metatarsals
(4 marks) (c) Pelvic girdle(1 mark)
(d) H Gliding joint(2 marks)
L Hinge joint(3 marks)
(e) Component Function(1 mark)
Ligament; Attach a bone to another bone;(2 marks)
Cartilage Shock absorber/facilitate gliding/reduce friction Synovial fluid Lubrication/reduce friction/shock absorber Synovial membrane; Secretes synovial fluid;
