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.
75%
50%
25%
100%
Correct answer is A
A heterozygote for sickle-cell anaemia = AS
Crossing two AS persons, we have one AA, two AS, and one SS.
∴ The probability that the children are either carriers or sicklers = ¾
= 75%
If a DNA strand has a base sequence TCA, its complementary strand must be
ATG
TAG
GAT
AGT
Correct answer is D
No explanation has been provided for this answer.
The pioneer organisms in ecological succession are usually the
mosses
lichens
ferns
algae
Correct answer is B
No explanation has been provided for this answer.
Soil fertility can best be conserved by the activities of
Earthworm
Man
Rodent
Microbes
Correct answer is D
No explanation has been provided for this answer.
A limited factor in a plant population near a chemical factory is likely to be
Light
Humidity
wind
pH
Correct answer is D
No explanation has been provided for this answer.