Jamb Biology Past Questions For Year 1990
Question 51
Which of the following constitute pollution?
- A. Droppings from birds
- B. loud disco sound
- C. A pack of cigarettes
- D. Refuse in an incinerator
Question 52
Which set of disease is spread mainly by insect vectors?
- A. Cholera, tenia and gonorrhoea
- B. Poliomyelitis, tuberculosis and syphilis
- C. Cholera, malaria and tuberculosis
- D. Malaria, cholera and river blindness
Question 53
Physiological adaptation to very dry condition in animals is called
- A. hibernation
- B. aestivation
- C. rejuvenation
- D. xeromorphism
Question 54
Free nitrogen is released to the atmosphere by
- A. Nitrogen-fixing bacteria
- B. nitrifying bacteria
- C. denitrifying bacteria
- D. saprophytic bacteria
