Biology Past Questions And Answers
A red blood cell haemolyses when placed in a hypotonic solution because
- A. it contains haemoglobin
- B. the cytoplasm is less dense
- C. the cell lacks a wall
- D. its pigment has a high affinity for water
Conservation of wildlife is necessary mainly because
- A. wild species cannot resist disease better than their domesticated species
- B. many predator wild animals help in the control of pests
- C. it prevents extinction of species
- D. many people derive pleasure from observing wild animals
People who suck petrol with their mouths run the risk of increasing in their blood the concentration of
- A. iron
- B. lead
- C. calcium
- D. magnesium
A woman with the ability to roll her tongue (Tt) marries a man who cannot roll his tongue(tt). what is the probability of each of their children being a tongue roller?
- A. 100%
- B. 75%
- C. 50%
- D. 25%
The ability of organisms to maintain a constant internal environment is known as:
- A) dieresis
- B) endosmosis
- C) plasmolysis
- D) homeostasis
Which of the following organisms is both parasitic and autotrophic?
- A. Sundew
- B. Loranthus
- C. Rhizopus
- D. Tapeworm
The correct arrangement of food classes of the same quantity in the order of magnitude of energy value in animals in descending order is
- A. Carbohydrates, fats and oils, water, protein
- B. Fats and oils, carbohydrates, protein, water
- C. Water, fats and oils, carbohydrates, protein
- D. Protein, fats and oils water and carbohydrates
Which of the following factors is not associated with aquatic habitat?
- A. Temperature
- B. Light intensity
- C. Turbidity
- D. Humidity
All living things
- A) Thesize
- B) respire
- C) move
- D) feed
The mineral needed for the formation of haemoglobin is
- A. magnesium
- B. iron
- C. phosphorus
- D. calcium