16. 
Use the diagram to answer the questions 16 to 17.
The vertebra illustrated is
- A. lumber
- B. thoracic
- C. caudal
- D. cervical
17. Use the diagram to answer the questions 16 to 17
The neural arch is labelled
- A. i
- B. ii
- C. iii
- D. iv
18. The excretory structure in the earthworm is the
- A. malphighian tubule
- B. flame cell
- C. nephridium
- D. kidney
19. In which of the following vertebrates does the skin function as a respiratory surface
- A. rat
- B. lizard
- C. fish
- D. frog
20. The process of walking is under the control of the part of the brain called
- A. optic lobe
- B. olfactory lobe
- C. cerebellum
- D. medulla oblongata
21. The function of ribosome in cells is
- A. protein synthesis
- B. starch synthesis
- C. transport of material
- D. lipid storage
22. A group of organism of different species living in a particular area is described as a
- A. colony
- B. community
- C. population
- D. niche
23. The biological association that contributes directly to succession in a community is
- A. competition
- B. predation
- C. parasitism
- D. commensalism
24. Floating microscopic heterotrophs are mostly grouped as
- A. phytoplankton
- B. zooplankton
- C. microbes
- D. nekton
25. Vaccination is carried out in order to
- A. check the production of poison
- B. increase the activities of white blood cells
- C. increase the number of red blood cells
- D. stimulate the production of anti-bodies
26. For growth to occur in organisms, the rate of
- A. anabolism must exceed that of catabolism
- B. catabolism must exceed that of anabolism
- C. food storage must be low
- D. food storage must be high
27. The probability of a baby being a boy or a girl depends on the contribution of the
- A. father’s sex cells
- B. father’s stomatic chromosome
- C. mother’s sex cell
- D. mother’s X-chromosome
28. Both recessive and dominant characters are found
- A. on different chromosome in the cell
- B. at the same logus of a homologous chromosome
- C. at a different loci of a homologous chromosome
- D. on the same chromatid in a chromosome
29.
- In a population of living things, the parameters of size, height, weight and colours are examples of
- A. continuous variation
- B. non-heritable variation
- C. discontinuous variation
- D. physiological variation
30. The process of water loss and intake indicated by the arrows labelled i and ii are respectively
- A. evaporation and osmosis
- B. osmosis and exhalation
- C. osmosis and diffusion
- D. urination and diffusion
