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.
An organism is considered a heterotroph when it
feeds on inorganic food
feeds on already manufactured food
fixes atmospheric nitrogen
respires anaerobically
Correct answer is B
No explanation has been provided for this answer.
The deficiency of vitamin D and calcium ions in the diet of a human causes
anaemia
night-blindness
kwashiokor
rickets
Correct answer is D
No explanation has been provided for this answer.
the cells of the plant will be turgid
there will be wilting of the plant
the leaves are likely to turn yellow
plant will not take in enough nutrients
Correct answer is A
No explanation has been provided for this answer.
The deficiency of manganese in plants results in?
death of shoot
leaves turning yellow
stunted growth
poor root development
Correct answer is B
Manganese deficiency can be easy to spot in plants because, much like Magnesium deficiency (agriculture), the leaves start to turn yellow and undergo interveinal chlorosis. The difference between these two is that the younger leaves near the top of the plant show symptoms first because manganese is not mobile while in magnesium deficiency show symptoms in older leaves near the bottom of the plant.
A solution which contains all the required elements in their correct proportions is known as a
culture nutrient
growth medium
complete culture solution
nutrient solution
Correct answer is C
No explanation has been provided for this answer.