Biology Past Questions And Answers
1611
Which of the following constitute pollution?
- A. Droppings from birds
- B. loud disco sound
- C. A pack of cigarettes
- D. Refuse in an incinerator
1612
Agglutination is the _______ of the ________
- A. coagulation, white bloodcell
- B. coagulation, water
- C. white blood cells, red blood cell
- D. coagulation, red blood cell
1613
Acquired characters are
- A. received from parents
- B. passed to offspring
- C. caused by the environment
- D. caused by mutation
1614
The role of an enzyme in a chemical reaction is to change which of the following?
- A. The pH at which the reaction occurs
- B. The temperature at which the reaction occurs
- C. The activation energy of the reaction
- D. The type of reaction
1615
P ? Q ? R ? S ? T
The organism designated P in the food chain above is normally sustained by energy from- A. sunlight
- B. carbohydrates
- C. green plants
- D. mineral salts
1616
The type of nutrition shown by spirogyra is
- A. Symbiosis
- B. Holozoic
- C. Chemosynthetic
- D. Holophytic
1617
In active transport, molecules move against a concentration gradient, therefore
- A. molecules move from a region of low concentration to a region of high concentration
- B. molecules move from a region of high concentration to a region of low concentration
- C. the concentration gradient has little effect on the movement of molecules
- D. molecules force their way through special channels
1618
During which o the following processes is food for animals produced?
- A. Photosynthesis
- B. Respiration
- C. Nutrition
- D. Digestion
1619
One of the following is not an excretory structure
- A) stomata
- B) blood
- C) kidney
- D) flame cell
1620
Which of the following soil types becomes less fertile due to the intense leaching caused by tropical rains?
- A. Yellow soil
- B. Laterite soil
- C. Red soils
- D. Black soil