Biology Past Questions And Answers
Which of the following structures differentiates an animal cell from a plant cell?
- A. Ribosomes
- B. Cell membrane
- C. Chloroplast
- D. Mitochondrion
The gill raker of fishes take part in?
- A. feeding
- B. respiration
- C. swimming
- D. diffusion
The hormone which regulates the amount of glucose in the blood is called?
- A. Adrenalin
- B. Auxin
- C. Insulin
- D. Thyroxine
The following are methods of measuring plant growth except
- A. determining the fresh and dry weights of the plant
- B. counting the number of fruits produced
- C. measuring the increase in height of the shoot
- D. measuring the length and breadth of a leaf.
The major role played by accessory pigments during photosynthesis is to?
- A. add colour to plants but not to trap light energy
- B. trap light energy that chlorophyll cannot absorb
- C. transfer energy from chlorophyll to other pigments
- D. prevent chlorophyll from absorbing unnecessary light
The mechanism of gaseous exchange in living organisms is essentially by
- A. osmosis
- B. inhalation
- C. diffusion
- D. exhalation
Which of the following are reasons why invasive species are often successful? I. Lack of competition II. Lack of predators III. Specialized diet
- A. II only
- B. I and III only
- C. II and III only
- D. I and II only
Which of the following factors does not control population growth? Options A) Food shortage B) Emigration C) Predation D) Abundance of foodWhich of the following factors does not control population growth?
- A) Food shortage
- B)Emigration
- C) Predation
- D) Abundance of food
The stunted growth of a leguminous plant suffering from nitrogen deficiency may be corrected by inoculating the soil with
- A. denitrifying bacteria
- B. Saprophytic bacteria
- C. Rhizobium
- D. Nitrosomonas
Which of the following enzymes does not belong to proteases?
- A. Sucrase
- B. Pepsin
- C. Trypsin
- D. Erepsin