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Biology
UTME / JAMB 1991
Digestive System & Feeding Mechanisms
The crown of the mammalian tooth is covered with
A
cement
B
dentine
C
caries
D
enamel
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #4856)
Biology
UTME / JAMB 1991
Respiration & Gaseous Exchange
Solution
In the living cells, insufficient oxygen may cause a breakdown of glucose into?
A
fatty acids
B
lactic acids
C
glycogen
D
carbon dioxide
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Breakdown of glucose in the absence of oxygen is referred to as Anaerobic respiration.
For some organisms, such as yeast, the end product is ethanol,
while in others such as human muscle cells, the end product is lactic acid.
Source: Myschool Past Questions Archive (Record #4857)
Biology
UTME / JAMB 1991
Excretion & Homeostasis
Which of the following is a plant excretory product?
A
Oil
B
Cytokinin
C
Resin
D
Amino acids
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #4871)
Biology
UTME / JAMB 1991
Nervous, Hormonal Coordination & Sense Organs
The movement of the whole organism to an external stimulus is termed
A
tropism
B
a taxis
C
a nastic movement
D
a phototropic movement
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #4873)
Biology
UTME / JAMB 1991
Supporting Tissues & Skeletal System
Which of the following vertebrae lacks a centrum?
A
Atlas
B
Axis
C
Thoracic
D
Lumbar
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #4876)
Biology
UTME / JAMB 1991
Reproduction in Plants & Animals
The function of the epididymis in mammals is the
A
expulsion of urine
B
storage of sperms
C
circulation of blood
D
activation of sperms
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #4877)
Biology
UTME / JAMB 1991
Reproduction in Plants & Animals
Solution
A collection of achenes formed from several carpels of a flower is
A
a multiple fruit
B
an aggregate fruit
C
a shizocarp
D
a simple fruit
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
An aggregate fruit is formed from a single flower that possesses multiple separate (apocarpous) carpels. Each carpel develops into a small individual fruitlet, such as an achene, and these fruitlets are collected on a common receptacle. E.g strawberry(where the seeds on the outside are actually individual achenes clustered together).
Source: Myschool Past Questions Archive (Record #4878)
Biology
UTME / JAMB 1991
Reproduction in Plants & Animals
Vegetation propagation is described as asexual reproduction because
A
reproductive organs are not involved
B
new individuals are not formed
C
many new plants are produced
D
there is no exchange of genetic materials
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #4881)
Biology
UTME / JAMB 1991
Reproduction in Plants & Animals
Epigeal germination can be found in
A
sorghum
B
maize
C
millet
D
groundnut
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #4883)
Biology
UTME / JAMB 1991
Nervous, Hormonal Coordination & Sense Organs
A dwarf plant can be stimulated to grow to normal height by the application of
A
thyroxin
B
gibberellin
C
insulin
D
kinin
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #4884)
Biology
UTME / JAMB 1991
Cell Structure, Organization & Cell Division
The greatest contribution to genetic studies was made by
A
Thomas Morgan
B
Gregor Mendel
C
Charles Darwin
D
Robert Hooke
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #4886)
Biology
UTME / JAMB 1991
Variation & Genetics (Heredity)
The exchange of genes between homologous chromosomes is called
A
test cross
B
back cross
C
crossing-over
D
mutation
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #4887)
Biology
UTME / JAMB 1991
Transport System in Plants & Animals
Solution
Which of the following can bring about the greatest increase in the rate of transpiration?
A
Increased humidity
B
Reduced temperature
C
Reduced wind speed
D
Reduced humidity
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Relative humidity: As the relative humidity of the air surrounding the plant rises the transpiration rate falls. It is easier for water to evaporate into dryer air than into more saturated air.
Source: Myschool Past Questions Archive (Record #4859)
Biology
UTME / JAMB 1991
Cell & Its Environment (Diffusion, Osmosis & Transport)
Diagram
Solution
After 30 minutes, the level of sugar solution in the above figure will?
Attached Figure / Diagram
A
rise in x only
B
rise in Y only
C
be the same in X and Y
D
fall in Y
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Osmosis: A process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution(X) into a more concentrated one(Y).
Source: Myschool Past Questions Archive (Record #4862)
Biology
UTME / JAMB 1991
Cell & Its Environment (Diffusion, Osmosis & Transport)
Diagram
The process by which water moves from X to Y through the semi-permeable membrane is called
Attached Figure / Diagram
A
diffusion
B
osmosis
C
active diffusion
D
osmoregulation
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #4864)