Jamb 1999 Biology Questions
Question 16:
Mammals acclimatize to reduced oxygen content at high altitudes by
- A The stimulation of marrow to reduce the amount of erythrocytes produced
- B Increasing the rate at which erythrocytes are destroyed
- C The stimulation of marrow to produce more erythrocytes
- D Increasing the break down of the protein portion of the erythrocytes
Question 17:
The modes of nutrition in Nitrobacter, Ascaris and Homo sapiens respectively are
- A Photosynthetic , parasitic and holozoic
- B Chemosynthetic, parasitic and holozoic
- C Photosynthetic, parasitic and heterophytic
- D Chemosynthetic, holophytic and holozoic
Question 18:
The richest source of vitamin A are
- A Palm oil and groundnut oil
- B Palm oil and carrot
- C Rice and groundnut oil
- D Oranges and carrot
Question 19:
The force that holds water together in the form of a stream within the xylem tube is the
- A Cohesion of water molecules to one another by hydrogen bonds
- B Force of gravity attacking the water molecules through the hydrogen bonds
- C Attraction between the water and xylem osmotic force
- D Normal flow of water from the ground with help of gravitational force
Question 20:
Yellowing of leaves is a symptom associated with deficiency of
- A Iron, calcium and magnesium
- B Nitrogen, sulphur and potassium
- C Sulphur, phosphorus and iron
- D Magnesium, nitrogen and iron