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 type of reproduction that leads to variation in animal and plant populations is
budding
sexual
vegetative
asexual
Correct answer is B
No explanation has been provided for this answer.
A feature associated with the Y-chromosome in humans is
long eyelashes
prominent fingernails
facial hairs
enlarged breast
Correct answer is C
No explanation has been provided for this answer.
An organism that has been extensively used to test the chromosomes theory of heredity is
Drosophila melanogaster
Muscar domestica
Zea mays
Homo sapiens
Correct answer is A
No explanation has been provided for this answer.
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.