How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.
Which of the following can bring about the greatest increase in the rate of transpiration?
Increased humidity
Reduced temperature
Reduced wind speed
Reduced humidity
Correct answer is D
Relative humidity: As the relative humidity of the air surrounding the plant rises the transpiration rate falls. It is easier for water to evaporate into dryer air than into more saturated air.
1 tall : 3 short
3 tall : 1 short
1 tall : 1 short
4 short : 0 tall
4 tall : 0 short
Correct answer is B
No explanation has been provided for this answer.
Liver
Bladder
Spleen
Kidneys
Gall bladder
Correct answer is A
No explanation has been provided for this answer.
In the living cells, insufficient oxygen may cause a breakdown of glucose into?
fatty acids
lactic acids
glycogen
carbon dioxide
Correct answer is B
No explanation has been provided for this answer.
When spirogyra cell is immersed in a salt solution more concentrated than its cell sap, it
Remains unchanged
Takes up water an burst
Absorbs a little water
Loses water and shrivels
Becomes turgid
Correct answer is D
No explanation has been provided for this answer.