1990 - JAMB Biology Past Questions and Answers - page 1
1
The salinity of a brackish enviroment
A
increases immediately after rain
B
increase at the end of rainy season
C
Decrease with increase in micro-organisms
D
increase during dry season
correct option: d
Users' Answers & Comments2
Physiological adaptation to very dry condition in animals is called
A
hibernation
B
aestivation
C
rejuvenation
D
xeromorphism
correct option: b
Users' Answers & Comments3
Which set of disease is spread mainly by insect vectors?
A
Cholera, tenia and gonorrhoea
B
Poliomyelitis, tuberculosis and syphilis
C
Cholera, malaria and tuberculosis
D
Malaria, cholera and river blindness
correct option: d
Users' Answers & Comments4
Which of the following constitute pollution?
A
Droppings from birds
B
loud disco sound
C
A pack of cigarettes
D
Refuse in an incinerator
correct option: b
Users' Answers & Comments5
An acidic soil can be improved upon by
A
sedimentation
B
leaching
C
flocculation
D
watering
correct option: c
Users' Answers & Comments6
What do bacteria in root nodules derive from the host plant?
A
Protection and minerals
B
Water and minerals
C
Carbonhydrates and water
D
Protection and carbohydrates
correct option: a
Users' Answers & Comments7
Free nitrogen is released to the atmosphere by
A
Nitrogen-fixing bacteria
B
nitrifying bacteria
C
denitrifying bacteria
D
saprophytic bacteria
correct option: c
Users' Answers & Comments
9
If the blood is too concentrated, more water is absorbed from
A
5
B
4
C
3
D
1
correct option: b
Users' Answers & Comments10
A
1
B
2
C
3
D
4
correct option: a
Users' Answers & Comments