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 movement of Euglena towards the source of light is a?
tropic movement
tactic movement
nastic movement
kinetic movement
Correct answer is B
Taxis (tactic movement): A change in the direction of locomotion in a motile microorganism or cell, made in response to certain types of external stimulus
An adaptation for defense in animals is?
croaking of a male toad
basking in lizard
spines in porcupine fish
huddling together of penguins
Correct answer is C
The porcupine fish has spines on its body. The fish sucks in water and swells up to make the spines stick out. This transforms it from a small mouthful into an uneatable ball of prickly spines. Its flesh also contains a deadly poison as an extra defense.
Which of the following statements about sex linked traits is not correct?
male inherit sex linked traits from thier fathers
sex linked traits are more common in males
females can be carriers beacuse they can be heterozygous for the trait
males are never carriers since they only recieve one sex chromosome
Correct answer is D
No explanation has been provided for this answer.
Which of the following statements best describes a test cross?
to determine the genotype of an individual whose phenotype is to be known
to determine the phenotype of an individual whose genotype is known
between the progeny of parents to ascertain external expressions
between two homozygous recessive individuals to confirm the genotypes
Correct answer is C
No explanation has been provided for this answer.
Tt and tt
TT and TT
tt and tt
TT and Tt
Correct answer is D
No explanation has been provided for this answer.