JAMB - Biology (2025)

1
The process that brings about the cooling effect on the body of mammals is
პასუხი
(A)
sweat excretion
2
Which of the following controls protein and enzyme syntheses in the cytoplasm of the cell?
პასუხი
(B)
Nucleus
3
Use the diagram above to answer the question that follows.

The structure labelled I is adapted for
პასუხი
(D)
sucking
4
A complex feeding relationship between organisms in a habitat that involves transfer of energy in form of food is
პასუხი
(A)
food web
5
One of the characteristics of insect pollinated flowers is
პასუხი
(C)
scented flowers
6
The process by which plants absorb water from the soil through their roots is
პასუხი
(C)
osmosis
7
The bright colouration of the flower of a flowering plant is an adaptation for
პასუხი
(A)
reproduction
8
Use the diagram above to answer the questions that follow

The endocrine gland that is located in the part labelled I is
პასუხი
(C)
pituitary
9
One of the components of peripheral nervous system is
პასუხი
(D)
sensory neurones
10
When the cotyledons appear above the soil during germination is called
პასუხი
(B)
epigeal
11
The type of teeth used for tearing in man is labelled
პასუხი
(D)
II
12
Which of these animals create their natural habitats in burrows?
პასუხი
(A)
Bush rat
13
The green-brown colour of grasshopper's body in dry grass field is an adaptation for
პასუხი
(A)
camouflage
14
Which of the following is an advantage of cross fertilization?
პასუხი
(B)
It leads to the production of healthier offspring.
15
In most vertebrates, the common basic plan with a skull, vertebral column and a pair of girdle is an evidence of evolution from
პასუხი
(C)
comparative anatomy
16
Example of animal exhibiting mating colouration is
პასუხი
(A)
agama lizard
17
Which of the following is the excretory organ in birds?
პასუხი
(B)
kidneys
18
Whose theory of evolution supports that characters acquired through use or disuse are transmitted to offspring?
პასუხი
(D)
Larmark
19
The most suitable soil for crops cultivation in Nigeria is
პასუხი
(B)
loamy
20
When calyx of a flower is joined together, it is called
პასუხი
(A)
gamosepalous
21
Which of the following statements about poliomyelitis is correct?
პასუხი
(D)
It is capable for paralysing the limbs.
22
What is the phenotype of the offspring produced in F\(_1\)?
პასუხი
(D)
Heterozygous tall
23
The cortex of a herbaceous stem is made up of
პასუხი
(D)
parenchyma and collenchyma
24
The most advanced spermatophyte that forms the largest group of plant kingdom is the
პასუხი
(B)
angiosperm
25
Which of the following is a medium of transportation in animal cells?
პასუხი
(D)
Blood
26
The part labelled I is the
პასუხი
(D)
nucleus
27
Which of these is an estuarine habitat?
პასუხი
(A)
Lagoon
28
The mouth parts of a grasshopper are adapted for
პასუხი
(C)
biting and chewing
29
The following are factors that affect the population growth of an organism except
პასუხი
(C)
natality
30
In ecological succession, the final stable community is called
პასუხი
(A)
climax
31
The innermost layer of mammalian epidermis is
პასუხი
(D)
malphigian layer
32
In a cross involving a heterozygous red flower plant (Rr) and a white flowered plant (rr), what is the probability that the offspring will be Rr?
პასუხი
(A)
\(\frac{1}{2}\)
33
The structure that helps in the formation of cilia and flagella is
პასუხი
(B)
centriole
34
The vertebrate bone responsible for the attachment of the abdominal muscles is
პასუხი
(C)
lumber
35
The canine teeth are prominent in which group of animals?
პასუხი
(A)
Carnivores
36
Translocation of manufactured food in plants is through the
პასუხი
(B)
phloem cells
37
The most advanced organism in an evolutionary trend among the following is
პასუხი
(C)
earthworm
38
One of the following adapts baobab tree to savanna habitat.
პასუხი
(D)
Presence of thick bark
39
Albinism is a disorder caused by
პასუხი
(C)
recessive genes
40
An example of a reflex action is
პასუხი
(C)
coughing
41
Which of the following is an example of vestigial structure?
პასუხი
(B)
Human appendix
42
The correct base pair in DNA molecule is
პასუხი
(D)
adenine - thymine
43
Population replacement among species of organisms in a given habitat under competition is due to
პასუხი
(C)
natural selection
44
Appendix in humans and caecum in herbivores are evidences of evolution from
პასუხი
(A)
vestigial organ
45
A form of adaptive colouration that helps animals to remain unnoticed is
პასუხი
(D)
countershading
46
Genetically Modified Organisms (GMO) food products are of benefit to farmers because they are
პასუხი
(A)
resistant crop varieties
47
The variation that can be applied in crime detection is
პასუხი
(D)
fingerprints
48
The date palm is commonly planted in Sahel zone of
პასუხი
(B)
Borno
49
The region of a flower stalk attached to flower parts is
პასუხი
(D)
receptacle
50
Which of the following processes takes place in the carbon cycle?
პასუხი
(A)
Combustion
51
An instrument used in measuring plants growth is
პასუხი
(B)
auxanometer
52
Chlamydomonas belongs to the phylum
პასუხი
(B)
protophyta
53
The part of the flower that is brightly coloured and attract pollinating agents such as insects is labelled
პასუხი
(A)
III
54
Which of the following blood groups will clump when mixed with anti-a antibody serum?
პასუხი
(A)
A and AB
55
Which of these is the correct arrangement of tissues in herbaceous roots from the circumference to the center?
პასუხი
(A)
piliferous layer, cortex, pericycle, vascular tissue and pith
56
The part labelled I is the
პასუხი
(C)
shell
57
The function of the organelle labelled II is to
პასუხი
(D)
coordinate the activities of the cell
58
The cell component that stores waste products is the
პასუხი
(C)
vacuoles
59
Which of these plants is considered to be common in an estuarine habitat?
პასუხი
(D)
Mangrove
60
Renal artery branches and divides into a mass of blood capillaries in the Bowman's capsule called
პასუხი
(C)
glomerulus
61
Glucose → ethanol + CO\(_2\)

The chemical reaction above represents the process of
პასუხი
(B)
fermentation
62
Agglutination occurs in blood transfusion when the
პასუხი
(A)
antigen and antibody in the donor and the recipient are incompatible
63
Part of the littoral zone of the marine habitat above the high tide mark, wetted by spray of water from breaking of waves is referred to as the
პასუხი
(A)
splash zone
64
Which of the following differentiates photosynthesis from respiration?
პასუხი
(B)
Oxygen is usually liberated.
65
Use the diagram above to answer the questions that follow

The part labelled II is the
პასუხი
(A)
Liver
66
In which state of Nigeria is Obudu game reserve located?
პასუხი
(A)
Cross Rivers
67
In Nigeria, the major climatic factor that determines the distribution of organisms is
პასუხი
(D)
rainfall
68
The slender and stick-like shapes of the stick insect is a structural adaptation for
პასუხი
(C)
protection and defense
69
In a community with limited resources, the less vigorous species are eliminated due to
პასუხი
(C)
competition
70
Which of the following statements is correct about sedimentation of a given soil?
პასუხი
(A)
Decaying organic matter remains afloat.
71
Which of the following exists at the organ level of organization?
პასუხი
(C)
Onion bulb
72
The organization that provides emergency needs of children globally is
პასუხი
(A)
UNICEF
73
A repeating unit of a very large DNA molecule is made up of
პასუხი
(C)
nucleotides
74
Which of the following is an effect of carbon monoxide on humans?
პასუხი
(B)
Reducing oxygen carrying capacity of blood
75
The constantly dividing cells found at the apex of roots and stem during growth is
პასუხი
(B)
apical
76
Macronutrients required by plants include
პასუხი
(D)
Calcium
77
The longest single bone in human is the
პასუხი
(C)
femur
78
One characteristic which differentiates bats from birds is that bats
პასუხი
(D)
possess mammary glands
79
The part labelled II is the
პასუხი
(C)
uterus
80
The biological association between bacteria and protozoa in the rumen of cattle is an example of
პასუხი
(A)
symbiosis
81
In which of the following organisms does niche differentiation serve as a means of reducing intraspecific competition?
პასუხი
(C)
Tilapia
82
Seaweeds and Barnacles are common flora and fauna found in which of these habitats?
პასუხი
(D)
Marine
83
Competition between cow and goat for scarce grasses during dry season can be described as
პასუხი
(C)
interspecific
84
The oxygen transported to all parts of the body during blood circulation is used for the
პასუხი
(D)
release of energy from food
85
The presence of tiny, non-functional hind leg bones inside a whale's body suggests that whales
პასუხი
(B)
evolved from ancestors that had legs
86
The genetic make up of an organism is referred to as the
პასუხი
(D)
genotype
87
The ability of chameleon to change its colour to that of the environment is for
პასუხი
(C)
defence
88
One of the following is a reflex action
პასუხი
(A)
sneezing
89
Proteins are macromolecules made of smaller units called
პასუხი
(D)
amino acids
90
Transparency of water is measured using a
პასუხი
(C)
secchi disc
91
The maximum number of organisms that the resources in the habitat can support is referred to as
პასუხი
(C)
carrying capacity
92
Desert plants are usually called
პასუხი
(D)
xerophytes
93
An example of a plant whose flower is dispersed by wind is
პასუხი
(D)
cypsela
94
An example of a saprophytic organism is
პასუხი
(A)
rhizopus
95
Absorption of nutrients in ferns is through
პასუხი
(D)
rhizome
96
Which of these insects has a piercing and sucking mouthpart?
პასუხი
(A)
mosquito
97
The segregation of genes occurs during
პასუხი
(A)
gamete formation
98
Which of the following is a behavioural adaptation of animals for avoiding adverse weather conditions?
პასუხი
(C)
Hibernation
99
A medium of transportation of materials in plants is the
პასუხი
(C)
cell sap
100
The artery that carries blood to the heart is
პასუხი
(A)
coronary
101
The blood vessel that takes away deoxygenated blood from the kidney is
პასუხი
(A)
renal vein
102
The relationship between fungus and alga in lichen is an example of
პასუხი
(B)
mutualism
103
The digestive enzyme pepsin is active in
პასუხი
(C)
acidic medium
104
One of the following is an epidemic diseases in Nigeria
პასუხი
(D)
cholera
105
The two - hoofed toes of camels allow easy walking on desert because of
პასუხი
(B)
enlarged foot surface
106
Which of these animals uses buccal respiration?
პასუხი
(A)
Toad
107
The prevalence of pests and diseases which affect plants and animals in a terrestrial habitat is
პასუხი
(C)
biotic factor
108
The heritable disease caused by distorted shape of the red blood cell, hindering free flow of blood in the vessel is
პასუხი
(D)
sickle cell anaemia
109
Use the illustration above to answer the question that follows

What is the genotypic ratio of the F\(_2\) generation?
პასუხი
(D)
1 : 2: 1
110
A structure associated with an open circulatory system is
პასუხი
(D)
haemocoel
111
Long beak with saw-like edges is an adaptation in
პასუხი
(C)
pelican
112
The zone in an ecosystem that provides habitat for living organism is referred to as
პასუხი
(C)
biosphere
113
An example of application of variation is
პასუხი
(A)
paternity determination
114
The level of organization in onion bulb is
პასუხი
(D)
organ
115
The type of germination in which the cotyledons remain below the soil surface is
პასუხი
(C)
hypogeal