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Biology
WAEC / WASSCE 2022
Science of Living Things
Solution
which of the following statements about living things is correct?
A
animals respire using carbon(iv)oxide as a raw material
B
growth in plants is limited after some time
C
most plants respond to stimulus slowly
D
higher animals can reproduce asexually
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Higher and more complex animals like birds and mammals can reproduce only by sexual means.
Source: Official Exam / Past Question Archive
Biology
WAEC / WASSCE 2022
Science 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.
The part labelled Il is the?
Attached Figure / Diagram
A
Pith
B
xylem
C
Phloem
D
endodermis
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
Biology
WAEC / WASSCE 2022
Science of Living Things
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
Science of Living Things
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
Science of Living Things
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
Science of Living Things
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
Science of Living Things
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
Science 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
WAEC / WASSCE 2022
Science 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.
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
Science of Living Things
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
Science of Living Things
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
Science of Living Things
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
Science of Living Things
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
Science of Living Things
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
Science of Living Things
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)