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Biology
WAEC / WASSCE 2022
Science of Living Things
Solution
In which of the following structures is simple sugar produced?
A
Vacuole
B
Cytoplasm
C
Chloroplast
D
Cell wall
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
The correct answer is C. Chloroplast.
Chloroplasts are organelles found in plant cells and some algae, responsible for photosynthesis. During photosynthesis, chloroplasts convert light energy, carbon dioxide, and water into glucose (a simple sugar) and oxygen:
6 CO\(_2\) + 6 H\(_2\)O + light energy → C\(_6\)H\(_{12}\)O\(_6\) (glucose) + 6 O\(_2\)
The other options are not correct:
A. Vacuoles are storage organelles that can contain water, salts, and other substances, but they are not involved in producing simple sugars.
B. Cytoplasm is the region between the cell membrane and the nucleus, where many metabolic processes occur. However, simple sugar production through photosynthesis occurs specifically in chloroplasts.
D. The cell wall is a structural layer outside the cell membrane that provides support and protection. It is not involved in producing simple sugars.
Source: Myschool Past Questions Archive (Record #63287)
Biology
WAEC / WASSCE 2022
Science of Living Things
An evidence of the occurrence of photosynthesis in an experiment is the?
A
release of carbon (IV) oxide
B
release of oxygen
C
formation of water molecules
D
formation and release of fructose
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 #63303)
Biology
WAEC / WASSCE 2022
Science of Living Things
The major source of vitamin A are ?
A
egg yolk, carrot and palm oil
B
mango, pawpaw,and eggs
C
sorghum,soya bean and liver
D
rice,bran,green vegetables and milk
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 #63307)
Biology
WAEC / WASSCE 2022
Science of Living Things
Diagram
Solution
Diagram J is a protease while diagrams K,L,M, and N are food substances, study them and answer this question.
Protease J would react with the particular illustrated substance because enzymes?
Attached Figure / Diagram
A
k
B
L
C
M
D
N
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Diagram L would form a reaction with protease J because of the shape of L which will fit into the hollow shape of diagram J
Source: Myschool Past Questions Archive (Record #63327)
Biology
WAEC / WASSCE 2022
Science of Living Things
Diagram
Diagram J is a protease while diagrams K,L,M, and N are food substances, study them and answer this question.
After a reaction between protease J and the food substance, the end product would be
Attached Figure / Diagram
A
fatty acids
B
glucose
C
amino acids
D
water
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 #63349)
Biology
WAEC / WASSCE 2022
Science of Living Things
Solution
The property of clayey soil that prevents it from supporting thick vegetation is its?
A
composition of chemically weathered granite rocks
B
inability to retain much water
C
tendency of becoming waterlogged
D
porosity and low water retention ability
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Clayey soil is a type of soil that is characterized by small particle size and high capacity for holding water. This property makes it prone to becoming waterlogged, especially during heavy rains. When soil is waterlogged, the water fills up all the air spaces between the soil particles, leaving no room for air. This lack of air can suffocate the roots of plants and can cause them to rot, making it difficult for thick vegetation to grow. Therefore, the property of clayey soil that prevents it from supporting thick vegetation is its tendency to become waterlogged.
Source: Myschool Past Questions Archive (Record #63358)
Biology
WAEC / WASSCE 2022
Science of Living Things
which of the following practices will not maintain soil fertility?
A
preventing soil erosion
B
bush fallowing
C
tendency of becoming waterlogged
D
porosity and low water retention ability
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 #63363)
Biology
WAEC / WASSCE 2022
Science of Living Things
Solution
A group of organisms of the same species living in a particular place is known as
A
colony
B
ecosystem
C
Niche
D
population
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
A population is a group of individuals of the same species interacting within the same space.
Source: Myschool Past Questions Archive (Record #63392)
Biology
WAEC / WASSCE 2022
Science of Living Things
Diagram
The diagram below is an illustration of an experiment on sedimentation of soil, use it to answer this question.
The organic component of the soil is labelled
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 #63422)
Biology
WAEC / WASSCE 2022
Science of Living Things
Diagram
Solution
The diagram above is an illustration of some parts of a mammalian ear. Study it and answer this question.
The middle ear is connected to the pharynx by the part labelled
Attached Figure / Diagram
A
I
B
II
C
III
D
IV
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
The Eustachian tube connects the middle ear space to the upper part of the throat. III
The upper part of the throat is called the nasopharynx. It is located behind the nose and above the soft palate. The nasopharynx serves as a passage for air from the nasal cavity to the throat and plays a role in the respiratory system. It also connects to the middle ear via the Eustachian tubes, helping to equalize pressure.
Source: Myschool Past Questions Archive (Record #63133)
Biology
WAEC / WASSCE 2022
Science of Living Things
Diagram
The diagram above is an illustration of some parts of a mammalian ear. Study it and answer this question.
The parts labelled I are the?
Attached Figure / Diagram
A
semi circular canals
B
ossicles
C
cochlea
D
external auditory meatus
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 #63221)
Biology
WAEC / WASSCE 2022
Science of Living Things
Diagram
The diagram above is an illustration of some parts of a mammalian ear. Study it and answer this question.
Which of the parts are correctly grouped?
Attached Figure / Diagram
A
(Inner ear I, IV) (Middle ear III) (Outer ear II)
B
(Inner ear III) (Middle ear II, IV) (Outer ear I)
C
(Inner ear III) (Middle ear II) (Outer ear III,IV)
D
(Inner ear II) (Middle ear I, III) (Outer ear 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 #63224)
Biology
WAEC / WASSCE 2022
Science of Living Things
Diagram
Solution
The diagrams above are illustrations of two different cells involved in biological processing in mammals. Study them and answer this question.
Which parts of P and Q fuse to complete the biological process?
Attached Figure / Diagram
A
III and I
B
IV and I
C
III and II
D
IV and II
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
P is a sperm cell whose nucleus(iii) then fuses with the egg plasma membrane(i) of the ovum(Q) and injects its nucleus and other organelles into the egg cytoplasm.
Source: Myschool Past Questions Archive (Record #63225)
Biology
WAEC / WASSCE 2022
Science of Living Things
Diagram
Solution
The diagrams above are illustrations of two different cells involved in biological processing in mammals. Study them and answer this question.
Which of the following statements about P and Q is correct?
Attached Figure / Diagram
A
Both cells are structures for asexual reproduction
B
Both cells normally belong to the same individual
C
Both cells are found in plants
D
The union of both cells gives rise to a new mammal
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
P - sperm cell:
III. Nucleus IV. Mitochondria
Q- Egg cell:
I. Nucleus II. Cytoplasm.
Sperm-egg fusion is a cell-cell membrane fusion event essential for the propagation of sexually reproducing organisms.
Source: Myschool Past Questions Archive (Record #63236)
Biology
WAEC / WASSCE 2022
Science of Living Things
Diagram
The diagram below is an illustration of an experiment on sedimentation of soil, use it to answer this question.
The part labelled IV is
Attached Figure / Diagram
A
silt
B
sand
C
humus
D
clay
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 #63424)