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Biology
UTME / JAMB 1992
Variation & Genetics (Heredity)
A child with blood group genotype different from those of both parents and with a mother of genotype OO, can only have a father of genotype
A
A
B
B
C
AB
D
OO
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 #5009)
Biology
UTME / JAMB 1992
Variation & Genetics (Heredity)
If R and r, denotes the genes for a character, the offspring of the cross between RR and Rr are
A
RR, 2Rr, rr
B
2RR, 2rr, 2rr
C
2RR, 2Rr
D
4Rr
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 #5010)
Biology
UTME / JAMB 1992
Variety of Organisms & Classification of Living Things
A mammal with red fur and long ears was crossed with another having white fur and short ears. If the offspring had a red fur and short ears, the
A
character are linked
B
character are not linked
C
parents are related
D
parents are not related
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 #5011)
Biology
UTME / JAMB 1992
Basic Ecological Concepts, Ecosystems & Biomes
In typical predator food chain involving secondary and tertiary consumers, the organism become progressively
A
smaller and more numerous along the food chain
B
equal in number and size along the food chain
C
larger and fewer along the food chain
D
parasitized along the food chain as consumers get bigger
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 #5002)
Biology
UTME / JAMB 1992
Variety of Organisms & Classification of Living Things
Diagram
Which level of the pyramid has the least total stored energy?
Attached Figure / Diagram
A
E
B
F
C
G
D
H
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 #5003)
Biology
UTME / JAMB 1992
Basic Ecological Concepts, Ecosystems & Biomes
Diagram
Which organism in the pyramid functions as a tertiary consumer?
Attached Figure / Diagram
A
Algea
B
Shark
C
Tadpole
D
Tilapia
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 #5004)
Biology
UTME / JAMB 1992
Basic Ecological Concepts, Ecosystems & Biomes
Solution
Mangrove swamp can be found
A
on a seashore with flat terrains
B
where a river meets the sea
C
on a mud flat near the sea
D
where two rivers meet
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
The correct answer is B - Where a river meets the sea.
Mangrove swamps are coastal ecosystems found in tropical and subtropical regions, typically where freshwater rivers meet the salty ocean. This unique environment, known as an estuary, provides a mixture of fresh and saltwater, creating a habitat for mangrove plants and a diverse array of wildlife.
Mangrove swamps thrive in these areas because:
- The river brings nutrient-rich sediment and freshwater, which supports plant growth.
- The ocean's tides and waves help distribute seeds, sediments, and nutrients.
- The mixture of fresh and saltwater creates a dynamic environment that supports a wide range of plant and animal species.
The other options are not correct because:
A. While mangroves can grow on flat terrains, they are not exclusive to these areas.
C. Mangroves can grow on mudflats, but this is not the primary location where mangrove swamps are found.
D. Mangrove swamps are not typically found where two rivers meet, as this would not provide the necessary mixture of fresh and saltwater.
Source: Myschool Past Questions Archive (Record #5005)
Biology
UTME / JAMB 1992
Variety of Organisms & Classification of Living Things
Soil with the finest particles is called
A
silt
B
clay
C
sand
D
gravel
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 #5006)
Biology
UTME / JAMB 1992
Adaptation & Evolution
The theory of natural selection was developed by
A
Lamarck and Darwin
B
Darwin and Wallace
C
Wallace and Mendel
D
Mendel and Larmack
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 #5017)
Biology
UTME / JAMB 1992
Adaptation & Evolution
Fossil records found in sedimentary rocks offer some explanation for the theory of evolution because
A
the deposit have remains of organisms characteristic of when they were formed
B
different strata have remains of organisms of the same kind
C
only organisms with strong parts are fossilized
D
most animal and plant fossils bear little resemblance to present day living specimens
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 #5018)
Biology
UTME / JAMB 1992
Adaptation & Evolution
Fossil records found in sedimentary rocks offer some explanation for the theory of evolution because
A
the deposit have remains of organisms characteristic of when they were formed
B
different strata have remains of organisms of the same kind
C
only organisms with strong parts are fossilized
D
most animal and plant fossils bear little resemblance to present day living specimens
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: Official Exam / Past Question Archive
Mathematics
UTME / JAMB 1991
Linear, Simultaneous & Quadratic Equations
Solution
A car travels from calabar to Enugu, a distance of P km with an average speed of U km per hour and continues to benin, a distance of Q km, with an average speed of Wkm per hour. Find its average speed from Calabar to Benin
A
\(\frac{(p + q)}{pw + qu}\)
B
\(\frac{uw(p + q)}{pw + qu}\)
C
\(\frac{uw(p + q)}{pw}\)
D
\(\frac{uw}{pw + qu}\)
medium Difficulty
Verified Correct Answer: Option B
Step-by-Step Mathematical Solution
Average speed = \(\frac{total Distance}{Total Time}\)
from Calabar to Enugu in time t1, hence
t1 = \(\frac{P}{U}\) also from Enugu to Benin
t2 \(\frac{q}{w}\)
Av. speed = \(\frac{p + q}{t_1 + t_2}
= p + q * \frac{p}{u} + \frac{q}{w}\)
= p + q x \(\frac{uw}{pw + qu}\)
= \(\frac{uw(p + q)}{pw + qu}\)
Source: WAEC / JAMB / NECO Classroom Archive (Record #31395)
Mathematics
UTME / JAMB 1991
Fractions, Decimals, Percentages & Approximations
Solution
What is the product of \(\frac{27}{5^1}\)(3)-3 and \(\frac{(1)^{-1}}{5}\)?
A
5
B
3
C
1
D
\(\frac{1}{25}\)
medium Difficulty
Verified Correct Answer: Option D
Step-by-Step Mathematical Solution
\(\frac{27}{5^1}\)(3)-3 x \(\frac{(1)^{-1}}{5}\) = \(\frac{27}{5}\) x \(\frac{1}{3^3}\) x \(\frac{1}{\frac{1}{5}}\)
= \(\frac{27}{5}\) x \(\frac{1}{27}\) x \(\frac{1}{5}\)
= \(\frac{1}{25}\)
Source: WAEC / JAMB / NECO Classroom Archive (Record #31376)
Mathematics
UTME / JAMB 1991
Fractions, Decimals, Percentages & Approximations
Solution
Musa borrows N10.00 at 2% per month simple interest and repays N8.00 after 4 months. How much does he still owe?
A
N10.80
B
N10.67
C
N2.80
D
N2.67
medium Difficulty
Verified Correct Answer: Option C
Step-by-Step Mathematical Solution
I = \(\frac{PRT}{100}\)
= \(\frac{10 \times 2 \times 4}{100}\)
= \(\frac{4}{5}\)
= 0.8
Total amount = N10.80
He pays N8.00
Remainder = 10.80 - 8.00
= N2.80
Source: WAEC / JAMB / NECO Classroom Archive (Record #31374)
Mathematics
UTME / JAMB 1991
Variations
Solution
If w varies inversely as \(\frac{uv}{u + v}\) and is equal to 8 when
u = 2 and v = 6, find a relationship between u, v, w.
A
uvw = 16(u + v)
B
16ur = 3w(u + v)
C
uvw = 12(u + v)
D
12uvw = u + v
medium Difficulty
Verified Correct Answer: Option C
Step-by-Step Mathematical Solution
W \(\alpha\) \(\frac{\frac{1}{uv}}{u + v}\)
∴ w = \(\frac{\frac{k}{uv}}{u + v}\)
= \(\frac{k(u + v)}{uv}\)
w = \(\frac{k(u + v)}{uv}\)
w = 8, u = 2 and v = 6
8 = \(\frac{k(2 + 6)}{2(6)}\)
= \(\frac{k(8)}{12}\)
k = 12
i.e 12 ( u + v) = uwv
Source: WAEC / JAMB / NECO Classroom Archive (Record #31398)