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Biology
UTME / JAMB 1981
Digestive System & Feeding Mechanisms
Solution
The correct route for a piece of bread eaten by a mammal is
A
oral cavity - oesophagus - stomach - ileum - rectum
B
oral - cavity - stomach - oesophagus - duodenum - ileum - rectum
C
oral cavity - oesophagus - duodenum - rectum
D
oral cavity - oesophagus - ileum - stomach - duodenum - rectum
E
oral cavity - oesophagus - stomach - ileum - duodenum - rectum
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
The correct route for a piece of bread eaten by a mammal is ⇒ oral cavity - oesophagus - stomach - ileum - rectum
Source: Myschool Past Questions Archive (Record #1897)
Biology
UTME / JAMB 1981
Supporting Tissues & Skeletal System
Solution
The thoracic vertebrae of a mammal is characterized by the
A
vertebraterial canal
B
prominent neural arch
C
prominent transverse
D
prominent neural spine
E
prominent centrum
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Thoracic vertebrae in mammals are often characterized by a prominent neural spine, also known as the spinous process. This spine is relatively more pointed and angles sharply downward compared to other vertebral types. This feature, along with the articulation of thoracic vertebrae with ribs, is a key characteristic of these vertebrae.
Source: Myschool Past Questions Archive (Record #1900)
Biology
UTME / JAMB 1981
Reproduction in Plants & Animals
Diagram
The correct figure sequence for the following labeled parts (stigma, ovary wall, embryo sac, integument and micropyle) is
Attached Figure / Diagram
A
12453
B
24135
C
21435
D
14325
E
31425
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 #15498)
Biology
UTME / JAMB 1981
Reproduction in Plants & Animals
Diagram
Which of the structure becomes the seed coat after fertilization?
Attached Figure / Diagram
A
1
B
2
C
3
D
4
E
5
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 #15499)
Biology
UTME / JAMB 1981
Variety of Organisms & Classification of Living Things
Diagram
What would happen if solution Y is more concentrated than solution X in the figure above?
Attached Figure / Diagram
A
the level of X would rise, Y would fall
B
the level of X would rise Y would rise
C
The level of X and Y would stay the same
D
The level of Y would rise and X would fall
E
The levels of Y would fall and X would fall
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 #15502)
Biology
UTME / JAMB 1981
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Diagram
Solution
which of the labelled tissues in the figure above is responsible for transport of mineral salts and water in living plants?
Attached Figure / Diagram
A
1
B
2
C
3
D
4
E
5
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
- There are two main types of vascular tissues: XYLEM & PHLOEM
- Xylem conducts water and mineral salts
- Phloem conducts manufactured foods
Source: Myschool Past Questions Archive (Record #15506)
Biology
UTME / JAMB 1981
Supporting Tissues & Skeletal System
Diagram
The bone labelled X in the figure above is the
Attached Figure / Diagram
A
ulna
B
fibula
C
radius
D
humerus
E
tibia
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 #15510)
Biology
UTME / JAMB 1981
Supporting Tissues & Skeletal System
Diagram
The joint at Y in the figure above is
Attached Figure / Diagram
A
ball and socket
B
hinge
C
pivot
D
rivet
E
none of the above
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 #15513)
Biology
UTME / JAMB 1981
Transport System in Plants & Animals
Diagram
What is the part marked X in the figure above called?
Attached Figure / Diagram
A
Pulmonary artery
B
Pulmonary vein
C
Vena cava
D
Main aorta
E
Hepatic artery
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 #15532)
Biology
UTME / JAMB 1981
Transport System in Plants & Animals
What is the part marked X in the figure above called?
A
Pulmonary artery
B
Pulmonary vein
C
Vena cava
D
Main aorta
E
Hepatic artery
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 1980
Fractions, Decimals, Percentages & Approximations
Solution
Three numbers, x, y and z are connected by the relationships y = \(\frac{4x}{9}\) + 1. If x = 99, Find z = \(\frac{4y}{9}\) + 1
A
6\(\frac{1}{3}\)
B
20
C
21
D
176\(\frac{4}{9}\)
E
None of the above
medium Difficulty
Verified Correct Answer: Option C
Step-by-Step Mathematical Solution
y = \(\frac{4x}{9}\) + 1, z = \(\frac{4y}{9}\) + 1, z = \(\frac{4}{9}\)(\(\frac{4}{9}\) x + 1) + 1
= [\(\frac{4}{9}\)(\(\frac{4}{9}\)(99) + 1]
= \(\frac{4}{9}\)(45) + 1
= 21
Source: WAEC / JAMB / NECO Classroom Archive (Record #32622)
Mathematics
UTME / JAMB 1980
Fractions, Decimals, Percentages & Approximations
Solution
(\(\frac{x^a}{x^b}\))a + b = (\(\frac{x^{a + b}}{x^{a - b}}\))\(\frac{a^2}{b}\)
A
x-a2
B
xb2
C
xa2 - b2
D
\(\frac{1}{x^{a2 + b2}}\)
E
xb2 - a2
medium Difficulty
Verified Correct Answer: Option D
Step-by-Step Mathematical Solution
(\(\frac{x^a}{x^b}\))a + b = (\(\frac{x^{a2 + ab}}{x^{b2 + ab}}\))
= xa2 - b2
{\(\frac{xa + b}{xa - b}\)} = xa + b - a + b
= x2b
= x2a
= xa2 - b2
= xb2 \(\div \) a2 = \(\frac{1}{x^\text a2 + b2}\)
Source: WAEC / JAMB / NECO Classroom Archive (Record #32628)
Physics
UTME / JAMB 1980
Circular Motion, Gravitation & Simple Harmonic Motion
Solution
A tugboat is travelling from Asaba to Onitsha across the River Niger with a resultant velocity of 20 knots. If the river flows at 12 knots, the direction of motion of the boat relative to the direction of water flow is?
A
36.87o
B
53.13o
C
90o
D
136o
E
143.13o
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
\(\theta\) = cos-1\(\frac{(12)}{20}\)
\(\theta\) = 53.13^\circ
Source: WAEC / JAMB / NECO Classroom Archive (Record #29102)
Physics
UTME / JAMB 1980
Temperature, Thermometry & Thermal Expansion
Solution
If the volume of a fixed mass of a gas is kept constant, the pressure of the gas
A
is inversely proprotional to its centigrade temperature
B
is inversely proportional to its absolute temperature
C
is directly proportional to its centigrade temperature
D
is directly proportional to its absolute temperature
E
remains constant also
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Gay-Lussac's Law states that the pressure of a given mass of gas varies directly with the absolute temperature of the gas, when the volume is kept constant.
Source: WAEC / JAMB / NECO Classroom Archive (Record #29114)
Physics
UTME / JAMB 1980
Magnetism, Electromagnetism & AC Circuits
Solution
The name given to the characteristics behavior of substances which set their length perpendicular to a strong magnetic field instead of in line with it is
A
magnetization
B
paramagnetism
C
diamagnetism
D
demagnetization
E
ferromagnetism
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
If diamagnetic substances are placed in a non-uniform magnetic field, then the substances move towards the weaker side of the field from the stronger side.
When a rod of diamagnetic substance is suspended in a uniform magnetic field, it comes to rest with its length perpendicular to the directions of the field
Source: WAEC / JAMB / NECO Classroom Archive (Record #29089)