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Biology
UTME / JAMB 1990
Variety of Organisms & Classification of Living Things
Diagram
Which of the following is an omnivore?
Attached Figure / Diagram
A
Praying mantis
B
Hawk
C
Mouse
D
Grasshopper
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 #4548)
Biology
UTME / JAMB 1990
Basic Ecological Concepts, Ecosystems & Biomes
which of the organisms will have the lowest population in an ecosystem?
A
Hawk
B
Cowpea
C
Praying mantis
D
Mouse
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 #4549)
Biology
UTME / JAMB 1990
Population Ecology, Habitats & Conservation
The salinity of a brackish enviroment
A
increases immediately after rain
B
increase at the end of rainy season
C
Decrease with increase in micro-organisms
D
increase during dry season
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 #4552)
Biology
UTME / JAMB 1990
Adaptation & Evolution
Physiological adaptation to very dry condition in animals is called
A
hibernation
B
aestivation
C
rejuvenation
D
xeromorphism
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 #4554)
Biology
UTME / JAMB 1990
Growth, Micro-organisms & Public Health
Which set of disease is spread mainly by insect vectors?
A
Cholera, tenia and gonorrhoea
B
Poliomyelitis, tuberculosis and syphilis
C
Cholera, malaria and tuberculosis
D
Malaria, cholera and river blindness
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 #4555)
Biology
UTME / JAMB 1990
Variety of Organisms & Classification of Living Things
Which of the following constitute pollution?
A
Droppings from birds
B
loud disco sound
C
A pack of cigarettes
D
Refuse in an incinerator
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 #4557)
Biology
UTME / JAMB 1990
Population Ecology, Habitats & Conservation
Solution
An acidic soil can be improved upon by
A
sedimentation
B
leaching
C
flocculation
D
watering
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Flocculation is the process where fine, individual soil particles (like clay) clump together into larger aggregates or "flocs". In acidic soils, the high concentration of hydrogen ions (H\(^+\)) and aluminum ions (Al\(^{3+}\)) often causes soil dispersion, which damages the soil structure, reduces aeration, and slows down drainage.
When alkaline soil conditioners like lime—Calcium hydroxide, (Ca(OH)\(_2\)), or Calcium carbonate, (CaCO\(_3\))—are added to correct acidity, the calcium ions (Ca\(^{2+}\)) naturally promote flocculation.
Source: Myschool Past Questions Archive (Record #4558)
Biology
UTME / JAMB 1990
Growth, Micro-organisms & Public Health
Solution
What do bacteria in root nodules derive from the host plant?
A
Protection and minerals
B
Water and minerals
C
Carbonhydrates and water
D
Protection and carbohydrates
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Bacteria in root nodules, specifically rhizobia, engage in a symbiotic (mutualistic) relationship with leguminous host plants. In this exchange, the plant undergoes photosynthesis to produce sugars (carbohydrates), such as malate and succinate, which it transports to the root nodules to provide the bacteria with energy for nitrogen fixation.
Moreover, the host plant forms a physical structure (the nodule) that provides a controlled, anaerobic environment. This protects the bacteria and their oxygen-sensitive nitrogenase enzymes. The bacteria, in return, convert atmospheric nitrogen into ammonia, a form the plant can use for growth.
Source: Myschool Past Questions Archive (Record #4559)
Biology
UTME / JAMB 1990
Basic Ecological Concepts, Ecosystems & Biomes
Free nitrogen is released to the atmosphere by
A
Nitrogen-fixing bacteria
B
nitrifying bacteria
C
denitrifying bacteria
D
saprophytic bacteria
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 #4561)
Biology
UTME / JAMB 1990
Excretion & Homeostasis
Diagram
Which structure is the glomerulus?
Attached Figure / Diagram
A
5
B
3
C
2
D
1
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 #15561)
Biology
UTME / JAMB 1990
Excretion & Homeostasis
Diagram
Solution
If the blood is too concentrated, more water is absorbed from?
Attached Figure / Diagram
A
5
B
4
C
3
D
1
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
When blood is too concentrated, the kidneys absorb more water from the proximal convoluted tubule (PCT) and the descending loop of the loop of Henle. The PCT reabsorbs a large portion of the water, and this is enhanced by the descending loop of the loop of Henle, which reabsorbs water to help concentrate the urine and rehydrate the body.
The proximal convoluted tubule is the first and primary site for water reabsorption, reabsorbing approximately 70% of the filtered water. This reabsorption is largely passive, creating an osmotic gradient that draws water out of the tubule.
Source: Myschool Past Questions Archive (Record #15562)
Biology
UTME / JAMB 1990
Nervous, Hormonal Coordination & Sense Organs
Diagram
All the cell bodies in the spinal cord are found in
Attached Figure / Diagram
A
1
B
2
C
3
D
4
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 #15563)
Biology
UTME / JAMB 1990
Nervous, Hormonal Coordination & Sense Organs
Diagram
In a reflex action, impulse flows from
Attached Figure / Diagram
A
1 to 2
B
2 to 1
C
4 to 1
D
4 to 2
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 #15564)
Biology
WAEC / WASSCE 1990
Variety of Organisms & Classification of Living Things
Which of the following methods of reproduction is common to Paramecium and Amoeba?
A
Conjugation
B
Sexual reproduction
C
Binary fission
D
Budding
E
Fragmentation
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 #17202)
Biology
WAEC / WASSCE 1990
Cell Structure, Organization & Cell Division
Which of the following structures controls the activities of the living cell?
A
Nucleus
B
Centrosome
C
Chloroplast
D
Golgi body
E
Mitochondrion
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 #17203)