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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)
Biology
UTME / JAMB 1991
Transport System in Plants & Animals
Fibrinogen and prothrombin play important roles in the
A
deamination of proteins
B
clotting of blood
C
detoxication of substance
D
storage of vitamins
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 #4867)
Biology
UTME / JAMB 1991
Transport System in Plants & Animals
Deoxygenation blood flows into the right and left lungs through the
A
pulmonary vein
B
vena cava
C
pulmonary artery
D
subclavian vein
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 #4870)
Biology
UTME / JAMB 1991
Basic Ecological Concepts, Ecosystems & Biomes
A food web is more stable than a food chain because
A
it contains more organisms
B
it has greater energy source
C
it is not easy to destroy
D
every organism has an alternative source
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 #4893)
Biology
UTME / JAMB 1991
Variety of Organisms & Classification of Living Things
Solution
Which of the following is likely to occur in a deciduous forest during the dry season?
A
New leaves are formed
B
The trees die off
C
The undergrowth increases
D
The ground becomes bare
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Trees in tropical deciduous forests lose their leaves in the dry season and regrow them in the rainy season. In temperate deciduous forests, trees lose their leaves in the fall and regrow them in the spring.During the dry season in a deciduous forest, trees shed their leaves to conserve water, they do not die off, but rather become dormant and regrow new foliage during the next suitable growing season. the forest canopy becomes less dense,the plants under the canopy may experience increased sunlight exposure, and the ground becomes drier and potentially more susceptible to wildfires.
Source: Myschool Past Questions Archive (Record #4894)
Biology
UTME / JAMB 1991
Population Ecology, Habitats & Conservation
Which of these is NOT an adaptive features for arboreal life?
A
Possession of long tail
B
Possession of claws
C
Possession of teeths
D
counter shading in coat colour
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 #4895)