Jamb Biology Past Questions For Year 1990
Question 46
Which of the following is an omnivore?
- A. Praying mantis
- B. Hawk
- C. Mouse
- D. Grasshopper
Question 47
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
Question 48
Haemophilia results from the mutation of the genes
- A. in the sex chromosome
- B. which control skin colour
- C. which control the mechanism for blood-clotting
- D. which control the formation of haemoglobin
Question 49
What do bacteria in root nodules derive from the host plant?
- A. Protection and minerals
- B. Water and minerals
- C. Carbonhydrates and water
- D. Protection and carbohydrates
Question 50
An acidic soil can be improved upon by
- A. sedimentation
- B. leaching
- C. flocculation
- D. watering
