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Biology
UTME / JAMB 1989
Variation & Genetics (Heredity)
Solution
Which of the following is a sex-linked character?
A
Sickle-cell anaemia
B
Tongue rollling
C
Skin colour
D
Colour blindness
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Colour blindness is a sex-linked character, specifically an X-linked recessive trait, meaning the genes responsible for it are located on the X chromosome.
Colour blindness is caused by genes on the X chromosome, and because males only have one X chromosome (XY), a single copy of the recessive gene can cause the condition.
Source: Myschool Past Questions Archive (Record #4392)
Biology
UTME / JAMB 1989
Basic Ecological Concepts, Ecosystems & Biomes
In an ecosystem, the LEAST efficient energy transfer link is from
A
producers to primary consumers
B
sun to producers
C
primary consumers to secondary consumers
D
secondary consumers to decomposers
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 #4393)
Biology
UTME / JAMB 1989
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Lichen is an example of
A
saprophytic organism
B
a symbiotic association
C
an epiphytic plant
D
a carnivorous plant
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 #4394)
Biology
UTME / JAMB 1989
Adaptation & Evolution
Solution
A physiological adaptation of plants to the problem of excessive water loss is
A
reduction in the number of stomata
B
reversal of the normal stomatal rhythm
C
possession of shallow roots
D
possession of waxy cuticles
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
To combat excessive water loss, plants employ physiological adaptations like stomatal closure, reduced leaf surface area, and waxy cuticles, along with strategies like leaf shedding and root proliferation to conserve water.
Stomatal closure, and specifically its reversal, is a crucial physiological adaptation that plants use to conserve water and prevent excessive water loss, particularly during drought or other water-stressed conditions.
Source: Myschool Past Questions Archive (Record #4395)
Biology
UTME / JAMB 1989
Growth, Micro-organisms & Public Health
Solution
which of the ways of controlling bilharzia can result in pollution?
A
clearing water weeds on which the snail feed
B
Treating infected people with drugs
C
Preventing contamination of water by infected urine and faeces
D
Applying chemical to kill the snails
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Bilharzia which is also known as Schistosomiasis is a disease caused by a parasite that develops in snails, lives in water and enters humans through your skin. Applying chemicals to ill the snails in the bid to control bilharzia will lead to air pollution because the snails would die and would begin to have offensive smell. However, option D is the correct answer.
Source: Myschool Past Questions Archive (Record #4396)
Biology
UTME / JAMB 1989
Growth, Micro-organisms & Public Health
which of the following disease can be caused by a bacterium?
A
Ringworm
B
Poliomyelitis
C
Malaria
D
Syphilis
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 #4397)
Biology
UTME / JAMB 1989
Variety of Organisms & Classification of Living Things
Which of the following is a dangerous product of coal burning?
A
Sulphur dioxide
B
Carbon dioxide
C
Carbon
D
Nitrogen
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 #4398)
Biology
UTME / JAMB 1989
Basic Ecological Concepts, Ecosystems & Biomes
Solution
5 g of oven dried soil was heated in a furnace for 24 hours. After cooling, it weighed 4.8 g. What is the amount of humus in the soil?
A
40.0g per 100 g dry soil
B
4.4g per 100g dry soil
C
4.0 g per 100g dry soil
D
0.4g per 100g dry soil
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Mass of soil before drying, M\(_1\) = 5g
Mass of soil after drying, M\(_2\) = 4.8g
Difference in mass,M\(_1\) - M\(_2\) = 5 - 4.8g = 0.2g
Amount of humus in the soil = \(\frac{{M_1} - {M_2}}{M_1}\times 100\)
= \(\frac{0.2}{5}\times 100\)
= 4.0g per 100 dry soil
Source: Myschool Past Questions Archive (Record #4399)
Biology
UTME / JAMB 1989
Population Ecology, Habitats & Conservation
Solution
Most irrigated lands often become unproductive in later years because of
A
loss of fertility
B
increase in salinity
C
soil erosion
D
loss of water
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Disadvantages of irrigation:
- Excess of water in soil leads to water logging
Source: Myschool Past Questions Archive (Record #4400)
Biology
UTME / JAMB 1989
Population Ecology, Habitats & Conservation
Solution
Farmers practise crop rotation because it
A
helps to prevent soil erosion
B
allows two crops to be planted at the same time
C
helps to conserve soil fertility
D
is an alternate to shifting cultivation
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Crop rotation is a practice used to maintain nutrients in agricultural soil
Source: Myschool Past Questions Archive (Record #4401)
Biology
UTME / JAMB 1989
Variety of Organisms & Classification of Living Things
Diagram
Solution
Which of the labelled parts is used for feeling?
Attached Figure / Diagram
A
1
B
2
C
3
D
4
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Butterflies are insects, and like all insects, their bodies are made up of three sections: the head, the thorax, and the abdomen.
Found at the top of the head are the antennae. These sensory organs detect chemicals in the air - to help the butterfly find food or a mate.
Source: Myschool Past Questions Archive (Record #15552)
Biology
UTME / JAMB 1989
Variety of Organisms & Classification of Living Things
Diagram
Solution
The structure labelled 2 is the
Attached Figure / Diagram
A
compound eye
B
ocellus
C
antenna
D
labial palp
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
The part labeled 2 is the labial pal
Source: Myschool Past Questions Archive (Record #15553)
Biology
UTME / JAMB 1989
Digestive System & Feeding Mechanisms
Diagram
Which of the structure is the molar?
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 #15554)
Biology
UTME / JAMB 1989
Reproduction in Plants & Animals
Diagram
What is the function of 3?
Attached Figure / Diagram
A
cutting of large piece of food
B
seizure and tearing of prey
C
Grinding of food
D
Tearing of flesh only
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 #15555)
Biology
UTME / JAMB 1989
Supporting Tissues & Skeletal System
Diagram
The type of joint at the point labeled 5 is the?
Attached Figure / Diagram
A
pivot joint
B
gliding joint
C
ball and socket joint
D
hinge joint
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 #15556)