21. The source of energy required by plants during food production is
- A. Photosynthesis
- B. Chlorophyll
- C. Sunlight
- D. Microorganisms
22. One major difference between plant and animals nutrition is the ability of plants to synthesize
- A. Food for plants and animals
- B. Water for plants
- C. Water for animals
- D. Food for plants only
23.
By what process is starch converted into maltose?
- A. Hydrolysis
- B. Condensation
- C. Translocation
- D. Photosynthesis
24. The ascent of water in tall trees is mainly due to
- A. adhesive forces
- B. transpiration pull
- C. root pressure
- D. cohesive forces
25. The duodenum of a person was surgically removed. Which of the following substances would have their digestion affected?
- A. starch and protein only
- B. starch and lipids
- C. starch, peptones and maltose
- D. starch, protein and lipids
26.
Which of the following dental formulae represents the dentition in rabbits?
- A. I 2/1 C 0/0 P 3/2 M 3/3
- B. I 2/2 C 1/1 P 2/2 M 3/2
- C. I 1/2 C 0/0 P 2/3 M 3/3
- D. I 2/1 C 0/01 P 3/2 M 3/3
27. The diagram above is an illustration of an experimental set-up to demonstrate a property of soil. The property of soil demonstrated is
- A. particle size
- B. capillarity
- C. colour
- D. texture
28. Which of the following statements would be a correct observation at the end of the experiment? Water moves
- A. highest in sandy soil
- B. lowest in loamy soil
- C. to the same level in all soil types
- D. highest in clayey soil
29. The most important factor(s) that influence(s) the ecological niche of an organism is/ are the
- A. water, light and predator-prey relationship
- B. food and water availability
- C. physical environment
- D. competition for food and space
30. 
The diagram above is an illustration of organisms in an air-tight aquarium.The most important factor needed by the organisms is
- A. light energy
- B. low humidity
- C. oxygen
- D. nitrate
