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Biology
WAEC / WASSCE 2022
Cell Structure, Organization & Cell Division
The organelles in cells which are also referred to as suicidal bags are the
A
mithchondria
B
lysosomes
C
ribosomes
D
nuclei
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 #63056)
Biology
WAEC / WASSCE 2022
Cell & Its Environment (Diffusion, Osmosis & Transport)
The process that brings about the shrinking of a spirogyra cell when placed in a strong solution is ?
A
osmosis
B
autolysis
C
plasmolysis
D
diffusion
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 #63058)
Biology
WAEC / WASSCE 2022
Supporting Tissues & Skeletal System
The region of a plant stem in which cells divide to increase its diameter is
A
cambium
B
phloem
C
xylem
D
collenchyma
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 #63062)
Biology
WAEC / WASSCE 2022
Supporting Tissues & Skeletal System
The total number of caudal vertebrae in animals X and Y is 4 and 27 respectively. The animals are likely to be.
A
fish and human
B
toad and rat
C
toad and fish
D
humans and rat
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 #63069)
Biology
WAEC / WASSCE 2022
Excretion & Homeostasis
Organ level of organization in living things is found in?
A
waterleaf plant
B
virus particle
C
kidney
D
spermatozoon
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 #62799)
Biology
WAEC / WASSCE 2022
Variety of Organisms & Classification of Living Things
Diagram
Diagrams X and Y above are illustrations of transverse sections of a part of plants. study them and answer this question
which of the following statements is not correct? Diagrams X and Y are sections of
Attached Figure / Diagram
A
roots
B
a dicotyledonous root
C
vascular bundies
D
stems
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 #62808)
Biology
UTME / JAMB 2022
Population Ecology, Habitats & Conservation
Solution
sources of air pollutants are?
A
industrial chimneys, burning fossil oils and river dams
B
sulphurdioxide, acid rain and pesticides
C
sulphur dioxide, vehicle exhausts, and aerosols
D
sewage,smoke and old vehicles
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Household combustion devices, motor vehicles, industrial facilities and forest fires are common sources of air pollution. Pollutants of major public health concern include particulate matter, carbon monoxide, ozone, nitrogen dioxide and sulfur dioxide.
Source: Myschool Past Questions Archive (Record #63009)
Biology
UTME / JAMB 2022
Variety of Organisms & Classification of Living Things
Solution
The body of a snail is divided into head?
A
thorax and abdomen
B
visceral mass and abdomen
C
thorax and foot
D
visceral mass and foot
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
A snail's body consists of these main parts – the head, the visceral hump, and the foot
Source: Myschool Past Questions Archive (Record #63044)
Biology
WAEC / WASSCE 2022
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Diagram
Diagrams X and Y above are illustrations of transverse sections of a part of plants, Study them and answer this question.
The part responsible for conducting water and dissolved mineral salts from the soil to the leaves is labelled
Attached Figure / Diagram
A
I
B
II
C
III
D
IV
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 #63053)
Biology
WAEC / WASSCE 2022
Transport System in Plants & Animals
Solution
Which of the following blood components has the greatest affinity for oxygen and carbon (IV) oxide?
A
Lymphocyte
B
Erythrocyte
C
Blood plasma
D
Thrombocyte
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Erythrocytes which is also known as red blood cells,(RBCs) carry oxygen and carbon dioxide in the blood. Hemoglobin, a protein in RBCs, binds to oxygen and carbon dioxide.
Oxygen: RBCs pick up oxygen in the lungs, where the partial pressure of oxygen is high. The hemoglobin becomes saturated with oxygen, forming oxyhemoglobin. The oxygen-rich RBCs then travel to tissues throughout the body. In the tissues, the oxyhemoglobin releases oxygen, which is used to produce energy.
Carbon dioxide: RBCs carry carbon dioxide away from tissues back to the lungs. Some carbon dioxide binds directly to hemoglobin. RBCs also carry an enzyme that converts carbon dioxide into bicarbonate, which is transported to the lungs. In the lungs, the bicarbonate is converted back into carbon dioxide and released.
Source: Myschool Past Questions Archive (Record #63071)
Biology
WAEC / WASSCE 2022
Respiration & Gaseous Exchange
Use the following processes to answer this question.
I-Ribs move upward and outward
II- Diaphragm relaxes
IIl-Volume of thorax increases
IV-Air is forced out of the lungs
Which of the processes take place during inspiration?
A
I and III only
B
II and III only
C
II and III only
D
III and IV only
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 #63081)
Biology
WAEC / WASSCE 2022
Respiration & Gaseous Exchange
Solution
Use the following processes to answer this question.
I-Ribs move upward and outward
II- Diaphragm relaxes
IIl-Volume of thorax increases
IV-Air is forced out of the lungs
which of the following processes is a direct result of contraction of the intercostal muscles?
A
I
B
II
C
III
D
IV
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
The process that is a direct result of the contraction of the intercostal muscles is I - Ribs move upward and outward.
When the intercostal muscles contract, they pull the ribs upward and outward, which helps to increase the volume of the thorax, allowing air to be drawn into the lungs.
Source: Myschool Past Questions Archive (Record #63088)
Biology
WAEC / WASSCE 2022
Nervous, Hormonal Coordination & Sense Organs
Diagram
Solution
The table above shows the effect of hormones I,II,III and IV on some parts of the human body. Where (✓) represents effects and (X) represents no effect of hormone on the corresponding part of the body. study it and answer this question.
Which of the following hormones are l, II, Ill and IV respectively?
Attached Figure / Diagram
A
ADH, Glucagon,
Oestrogen, Adrenaline
B
Adrenaline,
Glucagon, Oestrogen, ADH
C
Glucagon,ADH, Oestrogen, Adrenaline
D
Adrenaline,
ADH, Oestrogen, Glucagon
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
I. Adrenaline: adrenaline (epinephrine) does have effects on the heart, digestive system, kidney, and uterus. Adrenaline increases heart rate and blood pressure, slows digestion, redirects blood flow, and can affect kidney function. Additionally, it can relax uterine smooth muscle, potentially delaying labour.
II. ADH: antidiuretic hormone (ADH), also known as vasopressin, has a direct effect on the kidneys. ADH helps regulate water balance in the body by influencing the amount of water the kidneys reabsorb.
III. Oestrogen: plays a crucial role in preparing the uterus for pregnancy by thickening the endometrium, which is essential for implantation of a fertilized egg.
IV. Glucagon: primarily influences the digestive system by affecting blood glucose levels, which in turn impacts digestive processes like gastric emptying and enzyme secretion.
Source: Myschool Past Questions Archive (Record #63130)
Biology
WAEC / WASSCE 2022
Nervous, Hormonal Coordination & Sense Organs
Diagram
The table above shows the effect of hormones I,II,III and IV on some parts of the human body. Where (✓) represents effects and (X) represents no effect of hormone on the corresponding part of the body. study it and answer this question.
The hormone responsible for anxiety is?
Attached Figure / Diagram
A
I
B
II
C
III
D
IV
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 #63131)
Biology
WAEC / WASSCE 2022
Variation & Genetics (Heredity)
Diagram
The diagrams above are illustrations of two different cells involved in biological processing in mammals. Study them and answer this question.
If the number of chromosomes in the skin cells of mammals is 46, how many chromosomes would be found in P and Q respectively?
Attached Figure / Diagram
A
23 and 23
B
23 and 46
C
46 and 23
D
46 and 46.
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 #63237)