2018

JAMB Biology 2018 past questions

31 questions from the 2018 JAMB UTME Biology paper. Free, with answers where available.

Practice with CBT mock -> All Biology years
Biology JAMB 2018 Q6 OK Answer: B
In a plant cells, the role of the membrane is played by the
A
nucleolus
B
cell wall
C
cytoplasm
D
mitochondrion
Biology JAMB 2018 Q7
Red blood cells were found to have burst open after being placed in distil for an hour. This phenomenon is known as
A
plasmolysis
B
diffusion
C
haemolysis
D
wilting
Biology JAMB 2018 Q8
The curvature movement of plants in response to the stimulus of water is called
A
hydrotropism
B
geotropism
C
Phototropism
D
thigmotropism
Biology JAMB 2018 Q10
The longest bone in the body is the
A
humerous
B
femur
C
scapula
D
tibia
Biology JAMB 2018 Q11
Which of the following structures is not a skeletal material?
A
Chitin
B
Cartilage
C
Bone
D
Muscle
Biology JAMB 2018 Q12
The reason why the flow of blood through the capillaries is very slow is [PAGE 50]
A
because the walls of capillaries are very thin
B
to avoid high - blood pressure
C
to ensure that the individual does not get dizzy
D
to allow adequate time for exchange of materials
Biology JAMB 2018 Q13
Which of the following groups of organisms has kidney as their excretory organ?
A
Fishes, amphibians, birds, man
B
Fishes, amphibians, annelids, insects
C
Fishes, reptiles, birds, tapeworms
D
Fishes protozoans, amphibians, man
Biology JAMB 2018 Q14
Which of the following features is not a characteristic of arteries? Arteries
A
possess values at internals throughout their length.
B
have thick muscular and elastic walls
C
carry blood away from the heart
D
transport oxygenated blood with the exception of the pulmonary artery. The graph below shows the results of a laboratory investigation which measured the body temperatures of a lizard and a bird under changing artificial conditions. Use to answer questions 15 and 16.
Biology JAMB 2018 Q15
Which of the statements below is valid?
A
The bird's blood was always warmer than that of the lizard.
B
The body temperature of the bird varied less than that of the lizard during changes in environmental temperature.
C
The body temperature of the bird remained constant despite changes in environmental temperature.
D
The body temperature of the lizard was always close to that of the environmental temperature.
Biology JAMB 2018 Q16
What physiological term can be used to describe the regulation of the body temperature of the lizard?
A
Homeostasis
B
Homeothermy
C
Poikilothermy
D
Osmoregulation
Biology JAMB 2018 Q17
The reason why hospitals use saline solutions as drip instead of water is
A
because salt is a preservative
B
to prevent contamination of the body
C
to maintain the composition of body fluids
D
to increase the number of blood cells
Biology JAMB 2018 Q18
The part of the ear which contains nerve cells sensitive to sound vibrations is the
A
cochlea
B
ampulla
C
tympanum
D
malleus
Biology JAMB 2018 Q19
Spectacles with convex lenses correct long-sightedness by
A
converging the Light rays before they enter the eye
B
diverging the light rays before they enter the eye
C
reducing light intensity before it enters the eye
D
increasing light intensity before it enters the eye 20.A seed of a flowering plant can best be described as
Biology JAMB 2018 Q21
Which of the following processes removes carbon from the atmosphere?
A
Putrefaction [PAGE 51]
B
Photosynthesis
C
volcanic eruption
D
Burning fuels
Biology JAMB 2018 Q22
Which of the following cycles involves the process of precipitation and transpiration?
A
Water cycles
B
Carbon cycle
C
Nitrogen cycle
D
oxygen cycle
Biology JAMB 2018 Q23
What is the critical limiting factor for plants below the photic zone in an aquatic ecosystem?
A
Availability of nutrients
B
Availability of water
C
intensity of light
D
Carbon dioxide concentration
Biology JAMB 2018 Q24
Which of the following instruments is used to estimate the number o, plants in a habitat?
A
Pooter
B
Pitfall trap
C
Quadrat
D
Sweep net
Biology JAMB 2018 Q25
Which of the following statements is true about sandy soil? It
A
has limited air space
B
is light and easy to dig
C
drains slowly
D
is heavy and poorly aerated
Biology JAMB 2018 Q26
Which of the following organisms is a primary consumer?
A
Dog
B
Sheep
C
Grass
D
Fungus Study the diagram of a food chain shown below and use it to answer question 27 and 28. P->Q->R->S->T
Biology JAMB 2018 Q27 OK Answer: A
The organism designated P in the food chain above is normally sustained by energy from
A
sunlight
B
carbohydrates
C
green plants
D
mineral salts
Biology JAMB 2018 Q28 OK Answer: D
Which of the following statements best describes the organism designated R? It
A
feeds on S.
B
is a primary consumer.
C
is a producer as well as a consumer
D
is a secondary consumer
Biology JAMB 2018 Q29 OK Answer: B
Which of the following diseases is not hereditary?
A
Albinism
B
Scabies
C
Haemophilia
D
Colour blindness
Biology JAMB 2018 Q30 OK Answer: D
The immediate product of meiosis in flowering plants is the
A
sporophyte
B
gametophyte
C
zygote
D
pollen grains
Biology JAMB 2018 Q31 OK Answer: B
DNA in eukaryotic cells is contained in the
A
central vacuole
B
nucleus
C
lysosome
D
golgi body 32.A man who is heterozygous for the disease haemophilia marries a woman who is double recessive for haemophilia. What percentage of their offspring would have the disease?
Biology JAMB 2018 Q33 OK Answer: B
Cytokinesis of mitosis is a process that ensures that
A
each daughter cell gets the necessary organelle
B
there is distribution of a complete set of genes into each daughter cell.
C
daughter cells inherit new genetic combinations.
D
worn out organelles are excluded from daughter cells [PAGE 52]
Biology JAMB 2018 Q34
An animal which is active during the day is known as a
A
nocturnal animal
B
diurnal animal
C
terrestrial animal
D
homoatomic animal
Biology JAMB 2018 Q35
Evidence of evolution include the following except
A
fossil records
B
comparative anatomy
C
mutation of genes
D
geographical distribution of organisms Use the diagram below to answer question 36 and 37.
Biology JAMB 2018 Q36
The diagram shows that the organisms are
A
hermaphrodite
B
viviparous
C
oviparous
D
ovoviparous
Biology JAMB 2018 Q37
The breeding posture illustrated in the diagram is known as
A
mating
B
amplexus
C
courtship display
D
reproductive swimming
Biology JAMB 2018 Q38
An accurate identification of a rapist can be carried out by it conducting a
A
RNA analysis
B
DNA analysis
C
blood group test
D
behavioural traits test 39.A boy who is fond of swimming in a pond finds himself passing urine with traces of blood. He is likely to have contracted
Biology JAMB 2018 Q40
The flippers of a whale and the fins of a fish are examples of
A
divergent evolution
B
coevolution
C
continuous variation
D
convergent evolution