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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
WAEC / WASSCE 1991
Excretion & Homeostasis
Solution
The cell is a functional unit of living organisms because
A
multicellular organisms are made up of cells
B
all cells in a multicellular organism function as a single cell
C
the function of a multicellular organism is the sum total of the functions of its constituent cells
D
the function of a single cell is superior to that of the multicellular organism
E
the cells of a multicelullar organism are similar in structure
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
The cell is considered the functional unit of life because it is the smallest unit capable of performing all essential life processes, such as metabolism, respiration, and excretion. In a multicellular organism, the overall physiological activity and survival of the organism depend on the collective activities and specialized tasks performed by its individual cells. Therefore, the total function of the organism is the aggregate (or sum total) of the functions carried out by its constituent cells.
Option A describes the cell as a structural unit (the "building blocks") rather than explaining its role as a functional unit.
Source: Myschool Past Questions Archive (Record #15749)
Biology
WAEC / WASSCE 1991
Cell Structure, Organization & Cell Division
The organelle which eliminate water from the body of protozoa is
A
plasma membrane
B
contractile vacuole
C
cell wall
D
protoplasm
E
nucleus
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 #15750)
Biology
WAEC / WASSCE 1991
Variety of Organisms & Classification of Living Things
Spirogyra is regarded as a multicellular plant because
A
its cells are linked together by cytoplasmic strands
B
its cells are joined to form organs
C
the cylindrical cells are linked end to end
D
the filaments consist of one cell only
E
it is an algea containing large vacuoles
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 #15751)
Biology
WAEC / WASSCE 1991
Respiration & Gaseous Exchange
The mechanism of gaseous exchange in living organisms is essentially by
A
osmosis
B
inhalation
C
diffusion
D
exhalation
E
breathing
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 #15752)
Biology
WAEC / WASSCE 1991
Cell & Its Environment (Diffusion, Osmosis & Transport)
Which of the following statement is correct about diffusion?
A
it involves movement of water molecules only
B
Molecules move from a region of higher concentration to a region of lower concentration
C
differentially permeable membrane must be present for diffusion to occur
D
It involves when a solute can no longer dissolve in a solvent of only solute molecules into the Bowman's capsule
E
It occurs when a solute can no longer dissolve in a solvent
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 #15756)
Biology
WAEC / WASSCE 1991
Respiration & Gaseous Exchange
The process of anearobic respiration of yeast in sugar solution is known as
A
oxidation
B
fermentation
C
tissue respiration
D
alcohol production
E
decomposition
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 #15757)
Biology
WAEC / WASSCE 1991
Variety of Organisms & Classification of Living Things
The following are functions of the skeleton except
A
providing support for the body
B
protection of delicate internal organs
C
maintenance of the shape of the body
D
providing attachment for muscles
E
controlling growth rate in animals
medium Difficulty
Verified Correct Answer: Option E
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option E.
Source: Myschool Past Questions Archive (Record #15758)
Biology
WAEC / WASSCE 1991
Supporting Tissues & Skeletal System
Muscles are attached to bones by means of
A
ligament
B
cartilage
C
synovial membrane
D
tendons
E
connective tissue
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 #15759)
Biology
WAEC / WASSCE 1991
Supporting Tissues & Skeletal System
Solution
Which of the following tissues is not found in the stem and root of monocotyledons?
A
Xylem
B
Cambium
C
Pith
D
Cortex
E
Pericycle
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
The correct answer is B. Cambium.
In monocotyledons (monocots), the stem and root do not have a cambium layer. Cambium is a type of meristematic tissue that is responsible for secondary growth, allowing the stem and root to increase in diameter. Monocots, however, do not undergo secondary growth like dicotyledons (dicots) do.
The other options are all tissues that can be found in the stem and root of monocotyledons:
- Xylem (A) is a type of vascular tissue that transports water and minerals.
- Pith (C) is a type of ground tissue that is found in the center of the stem.
- Cortex (D) is a type of ground tissue that is found in the outer layer of the stem and root.
- Pericycle (E) is a type of tissue that is found in the outer layer of the root.
Source: Myschool Past Questions Archive (Record #15760)
Biology
WAEC / WASSCE 1991
Transport System in Plants & Animals
The pulmonary vein carries
A
oxygenated blood from right ventricles to the lungs
B
oxygenated blood from lungs to the left auricle
C
deoxygenated blood from the lungs
D
oxygenated blood from lungs to the right auricle
E
deoxygenated blood from the right ventricle to the lungs
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 #15761)
Biology
WAEC / WASSCE 1991
Respiration & Gaseous Exchange
The upper part of the trachea in mammals is called
A
palate
B
epiglottis
C
larynx
D
glottis
E
bronchus
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 #15762)
Biology
WAEC / WASSCE 1991
Excretion & Homeostasis
Which of the following parts of the mammalian skin is directly is directly involved in excretion?
A
Sebaceous gland
B
Sweat gland
C
Hormy layer
D
Hair follicle
E
Malphigian layer
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 #15763)