Jamb 1990 Biology Past Questions And Answers
1
In a savanna ecosystem the abiotic factors include
- A. legumes, temperature and sandy soil
- B. water, temperature and soil
- C. minerals, oxygen and reptiles
- D. water, soil and grasses
2
Which of the following types of soil has the highest water-retaining capacity?
- A. Clay
- B. Laterite
- C. Loam
- D. Gravel
3
which of the organisms will have the lowest population in an ecosystem?
- A. Hawk
- B. Cowpea
- C. Praying mantis
- D. Mouse
4
An acidic soil can be improved upon by
- A. sedimentation
- B. leaching
- C. flocculation
- D. watering
5
Which of the following animals has homodont dentition?
- A. Rat
- B. Man
- C. Lizard
- D. Pigeon
6
The salinity of a brackish enviroment
- A. increases immediately after rain
- B. increase at the end of rainy season
- C. Decrease with increase in micro-organisms
- D. increase during dry season
7
Hydra removes undigested food by
- A. passing it through the anus
- B. passing it through the mouth
- C. means of a contractile vacuole
- D. egesting it through the body surface
8
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
9
The part of the ear that is concerned with balance is the
- A. semi-circular canals
- B. incus
- C. malleus
- D. Eustachian tube
10
The mode of nutrition in which digestion is extracellular is
- A. holophytic
- B. parasitic
- C. holozoic
- D. saprophytic