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 placentation illustrated in the diagram above is
marginal
perietal
axile
basal
Correct answer is D
No explanation has been provided for this answer.
The illustration above represents a cross between a colour blind male and normal female.
Study it carefully and answer the questions.
Which of the genotypes are carriers of colour blindness?
1 and 11 only
1 and 111 only
11 and 111 only
1, 11 and 111 only
Correct answer is A
No explanation has been provided for this answer.
The illustration above represents a cross between a colour blind male and normal female.
Study it carefully and answer the questions.
What is the genotype ratio of carrier females to normal males in the cross?
1:1
2:3
3:4
4:1
Correct answer is A
No explanation has been provided for this answer.
Use the diagram above that shows the effect of nitrates on water bodies Study it carefully and answer questions.
Another cause that could lead to the phenomenon in the diagram is
exhaust from cars
oil spillage
dumping of sewage
excess rainfall
Correct answer is C
No explanation has been provided for this answer.
Use the diagram above that shows the effect of nitrates on water bodies Study it carefully and answer questions.
The phenomenon in the diagram is termed
denitrification
conservation
eutrophication
global warming
Correct answer is C
Eutrophication is the process by which a body of water becomes enriched in dissolved nutrients (such as nitrates in this case) that stimulate the growth of aquatic plant life usually resulting in the depletion of dissolved oxygen.