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 egg determines the phenotype of the son
sons inherit the sex chromosome of their mothers
the father's sex chromosomes is weaker in sons
sex-linked traits express dominance in females
Correct answer is D
No explanation has been provided for this answer.
Which of the following pairs are fully adapted to terrestrial life?
Ferns and algae
Ferns and mosses
Bryophytes and flowering plants
Flowering plants and conifers
Correct answer is D
No explanation has been provided for this answer.
Viruses are regarded as non-living because they
can niether reproduce asexually nor sexually
cannot survive in their respective enviroments
do not possess characteristics that can be transmitted from one generation to the next
can neither respire nor excrete
Correct answer is D
No explanation has been provided for this answer.
46.7
25.0
20.0
30.0
58.3
Correct answer is D
No explanation has been provided for this answer.
Atmospheric nitrogen is directly replenished in nature through
the activities of denitrifying bacteria
the breakdown of ammonium salts in the soil
the activities of nitrifying bacteria
the activities of nitrogen-fixing bacteria in root nodules
egestion, death and decay
Correct answer is A
The nitrogen in the soil is converted to atmospheric nitrogen by the process of DENITRIFICATION. This is done by the action of denitrifying bacterias eg several species of Pseudomonas.