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Biology
UTME / JAMB 1991
Growth, Micro-organisms & Public Health
Which of the following diseases can be prevented by innoculation?
A
Syphilis
B
Malaria fever
C
Tuberculosis
D
Acquired Immune Deficiency Syndrom
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 #4896)
Biology
UTME / JAMB 1991
Population Ecology, Habitats & Conservation
Sources of air pollutants are
A
industrial chimneys, burning fossil oils and river dam
B
sulphur dioxide, acid rain and pesticides
C
sulphur mines, vehicle exhausts and aerosols
D
sewage, smoke and old vehicle
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 #4897)
Biology
UTME / JAMB 1991
Variation & Genetics (Heredity)
Solution
When two heterozygotes mate, the dominant trait will appear in
A
the F1 generation only
B
the F2 generation only
C
both the F1 and F2 generations
D
neither the F1 nor F2 generation
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
When two heterozygotes (genotype Aa) mate, the dominant trait will appear in both the F1 and F2 generations because dominant alleles mask recessive ones whenever they are present. F1 Generation: By definition, the F1 generation refers to the first set of offspring from a set of parents. In a cross of Aa x Aa, approximately 75% of the offspring will possess at least one dominant allele (AA or Aa) and will therefore display the dominant trait. F2 Generation: The F2 generation is produced by crossing members of the F1 generation. Since the F1 contains individuals with dominant alleles, their subsequent crosses will continue to produce offspring that express the dominant trait in the standard Mendelian 3:1 phenotypic ratio.
Source: Myschool Past Questions Archive (Record #4888)
Biology
UTME / JAMB 1991
Variation & Genetics (Heredity)
Which of the following characters is NOT sex-linked?
A
River blindness
B
Baldness
C
Haemophilia
D
Colour blindness
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 #4889)
Biology
UTME / JAMB 1991
Basic Ecological Concepts, Ecosystems & Biomes
The most important factors which influence an organism's way of life in its habitat are
A
the physicals and biotic enviroment
B
Food and water availability
C
temperature, water, light and predator-prey relationship
D
competition for food and spaces
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 #4890)
Biology
UTME / JAMB 1991
Basic Ecological Concepts, Ecosystems & Biomes
Organisms in an ecosystem are usually grouped according to their trophic level as
A
carnivores and epiphytes
B
consumers and parasites
C
producers and consumers
D
producers and saprophytes
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 #4891)
Biology
UTME / JAMB 1991
Variety of Organisms & Classification of Living Things
Diagram
The above diagram represents a competitive interaction between organism in communities I and II. Which of the following statements is CORRECT?
Attached Figure / Diagram
A
The population of I was higher than II at the beginning of the experiments
B
II was wiped out from the enviroment at the end of the experiments
C
The population of II was always lower than that of
D
The population of I was lower at the end of the experiment than at the beginning
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 #4892)
Biology
UTME / JAMB 1991
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Fertilizers are lost from the soil through
A
sheet erosion and evaporation
B
leaching, underground seepages and run-off
C
sheet erosion, gully erosion and wind erosion
D
wind erosion and heavy rainfall
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 #4898)
Biology
UTME / JAMB 1991
Variety of Organisms & Classification of Living Things
Nitrogen- fixing micro-organisms in leguminous plants live symbiotically in the
A
root nodules
B
tap root
C
branch roots
D
root hairs
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 #4899)
Biology
UTME / JAMB 1991
Excretion & Homeostasis
Diagram
The structure labelled 4 is for
Attached Figure / Diagram
A
feeding
B
attachment
C
excretion
D
respiration
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 #15565)
Biology
UTME / JAMB 1991
Reproduction in Plants & Animals
Diagram
As the tadpole develops, the structure labelled 5
Attached Figure / Diagram
A
grows longer
B
becomes shorter
C
becomes the hind legs
D
remains unchanged
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 #15566)
Biology
UTME / JAMB 1991
Variety of Organisms & Classification of Living Things
Diagram
Solution
In the digestive system, absorption of nutrient into the blood takes place in the part labeled?
Attached Figure / Diagram
A
1
B
2
C
3
D
4
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Small intestine, particularly ilueum.
Source: Myschool Past Questions Archive (Record #15567)
Biology
UTME / JAMB 1991
Digestive System & Feeding Mechanisms
Diagram
Solution
The gland which produces trypsin, amylase and lipase is labeled?
Attached Figure / Diagram
A
6
B
4
C
2
D
1
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
The pancreas ( the organ labeled 4) contains exocrine glands that produce enzymes important to digestion. These enzymes include trypsin and chymotrypsin to digest proteins; amylase for the digestion of carbohydrates; and lipase to break down fats.
Source: Myschool Past Questions Archive (Record #15568)
Biology
UTME / JAMB 1991
Digestive System & Feeding Mechanisms
Solution
The gland which produces trypsin, amylase and lipase is labeled?
A
6
B
4
C
2
D
1
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
The pancreas ( the organ labeled 4) contains exocrine glands that produce enzymes important to digestion. These enzymes include trypsin and chymotrypsin to digest proteins; amylase for the digestion of carbohydrates; and lipase to break down fats.
Source: Official Exam / Past Question Archive
Mathematics
UTME / JAMB 1990
Indices, Logarithms & Surds
Solution
Correct 241.34(3 x 10-\(^3\))\(^2\) to 4 significant figures
A
0.0014
B
0.001448
C
0.0022
D
0.002172
medium Difficulty
Verified Correct Answer: Option D
Step-by-Step Mathematical Solution
first work out the expression and then correct the answer to 4 s.f = 241.34..............(A)
(3 x 10-\(^3\))\(^2\)............(B)
= 3\(^2\)x\(^2\)
= \(\frac{1}{10^3}\) x \(\frac{1}{10^3}\)
(Note that x\(^2\) = \(\frac{1}{x^3}\))
= 24.34 x 3\(^2\) x \(\frac{1}{10^6}\)
= \(\frac{2172.06}{10^6}\)
= 0.00217206
= 0.002172(4 s.f)
Source: WAEC / JAMB / NECO Classroom Archive (Record #31431)