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.
In the diagram, the part labelled I is the
nuclear membrane
cell wall
endoplasmic recticulum
plasmellema
Correct answer is B
No explanation has been provided for this answer.
In the diagram, the organelle responsible for heredity is
iii
iv
ii
i
Correct answer is A
No explanation has been provided for this answer.
In the diagram, the part marked I will contain a high concentration of
ascorbic acid
abscisic acid
ethylene
auxin
Correct answer is D
No explanation has been provided for this answer.
The experiment in the diagram demonstrates
geotropism
thigmotropism
phototropism
hydrotropism
Correct answer is A
Charles Darwin was one of the first to scientifically document that roots show positive gravitropism and stems show negative gravitropism. That is, roots grow in the direction of gravitational pull (i.e., downward) and stems grow in the opposite direction (i.e., upwards).
The breeding posture illustrated in the diagram is known as
mating
amplexus
courtship display
reproductive swimming
Correct answer is B
Amplexus defines the mating position of frogs and toads, in which the male clasps the female about the back.