1997 - JAMB Biology Past Questions and Answers - page 5
41
One of the most effective ways of controlling guinea worm is by
A
treating the disease
B
public enlightenment campaigns
C
accelerating rural developmnet
D
provision of portable drinking water
42
During binary fission in lower organisms, the nucleus is known to undergo
A
mitosis
B
meiosis
C
fragmentation
D
mutation
43
One reason for the success of Mendel's work is that the
A
was the first to carry out research work on modern genetics
B
introduced quantitative and qualitative elements into his work
C
selected two characteristics only at a time for study
D
drew up his laws of inheritance based on his knowledge of chromosomes
44
The homozygous condition HbsHbsresults in sickle cell anaemia whereas HbAHbs has the sickling trait. What is the probability that a couple with the sickling trait will give birth to one normal child?
A
1/2
B
1/4
C
1/8
D
none
45
Which of the following characters is NOT sex-linked?
A
Albinism
B
Baldness
C
Haemophilia
D
Colour blindness
46
What combination of character should a prey develop to survive the environment of its predator?
A
Camouflag, well developed limbs and effective vision
B
Showy colour, big body and well developed limbs
C
Camouflage, big body and effective vision
D
Showy colour, well developed muscles and an acute sense of smell
47
Fossil records found in sedimentary rocks offer some explanation for the theory of evolution because
A
the deposits have remains of organisms characteristic of when they were formed
B
different strata have remains of organisms of the same kind
C
only organisms with strong parts are fossilized
D
most animal and plant fossils bear little resemblance to present day living specimens
48
Long neck in giraffe is used to illustrate the theory of
A
use and disuse
B
origin of species
C
origin of life
D
natural selection
49
Water loss is regulated in plants and animals by both the
A
scales and the skin
B
scales and the hair
C
thick leaves and the feathers
D
leathery cuticle and the feathers
Loading lesson…