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.
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.
Which of the following groups contains only macro-nutrients?
phosphorus, nitrogen and molybdenum
manganese, copper and zinc
boron, sulphur and iron
calcium, magnesium and potassium
Correct answer is D
No explanation has been provided for this answer.
The process by which fruits develop without fertilization is called
parthenocarpy
pathology
hermaphroditism
layering
Correct answer is A
No explanation has been provided for this answer.
The following insects undergo incomplete metamorphosis except
termite
cockroach
butterfly
locust
Correct answer is C
No explanation has been provided for this answer.