2000 - JAMB Biology Past Questions and Answers - page 5
41
The pollutants that contribute to the depletion of the ozone layer in the atmosphere are
A
radioactive materials
B
oxides of sulphur
C
oxides of carbon
D
chlorofluorocarbons
correct option: d
Users' Answers & Comments42
The surest way to combine the best qualities of both parents in the offspring is by
A
cross-breeding
B
inbreeding
C
selective breeding
D
pure breeding
correct option: a
Users' Answers & Comments43
Blood grouping in human beings is derived from combinations of
A
two different alleles
B
four different alleles
C
three different alleles
D
two different genes
correct option: b
All humans and many other primates can be typed for the ABO blood group. There are four principal types: A, B, AB, and O. There are two antigens and two antibodies that are mostly responsible for the ABO types. The specific combination of these four components determines an individual's type in most cases
Users' Answers & Comments44
The older fossil-bearing rocks, in contrast to the more recent ones, are more likely to contain
A
animal rather than plant remains
B
invertebrates rather than birds
C
flowering plants rather than mosses
D
reptiles rather than fishes
correct option: a
Users' Answers & Comments45
In a group of male Agama lizards, the one with the brightest head colour is the
A
dominant
B
youngest
C
oldest
D
largest
correct option: a
Users' Answers & Comments46
Example of water-borne and sex linked diseases are
A
taeniasis and malaria
B
cholera and gonorrhoea
C
typhoid and syphilis
D
dracunculiasis and haemophilia
correct option: d
Users' Answers & Comments47
The mutation theory of organic evolution was propounded by
A
Gregor Mendel
B
Hugo de Vries
C
Jean Lamarck
D
Charles Darwin
correct option: b
Users' Answers & Comments48
A certain savanna grasshopper changes colour from green during the rainy season to brown during the dry season and black after dry season bush fires. The reason for these colour changes is that the
A
grasshopper is getting older
B
environmental temperature is changing
C
grasshopper is avoiding predation
D
grasshopper is frequently moulting
correct option: c
Users' Answers & Comments49
Complex social behaviour and organization are found mostly in
A
insects
B
birds
C
reptiles
D
mammals
correct option: d
Users' Answers & Comments50
Which of the following structural features are adapted for uses other than water conservation?
A
Succulent stems
B
Scales in animals
C
Spines in plants
D
Feathers in birds
correct option: a
Users' Answers & Comments