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Biology
WAEC / WASSCE 2021
Nervous, Hormonal Coordination & Sense Organs
Diagram
Solution
The diagram above is an illustration of a type of eye defect in humans. Study it and answer this question.
The eye defect can be corrected by the use of?
Attached Figure / Diagram
A
convex lens
B
concave lens
C
bifocal lens
D
cylindrical lens
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Nearsightedness (myopia) is corrected with lenses called “minus power lenses.”
They are concave-shaped and help the eyes focus light properly. Myopia causes a person to see distant objects as blurry.
Source: Myschool Past Questions Archive (Record #62372)
Biology
WAEC / WASSCE 2021
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Which of the following factors is not necessary for photosynthesis?
A
water
B
carbon (IV) oxide
C
wind
D
sunlight
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 #62378)
Biology
WAEC / WASSCE 2021
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Autotrophic nutrition is a process whereby an organism obtains food
A
by utilizing its store energy
B
by synthesizing simple substances using energy
C
from other organisms in exchange for some products
D
in a synthesized form, from other living organisms
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 #62379)
Biology
WAEC / WASSCE 2021
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
The process that takes place at the light stage of photosynthesis is?
A
splitting of water molecules to form hydrogen ions
B
reduction of carbon (IV) oxide to form carbohydrate
C
formation of two molecules of phosphoglyceric acid
D
breaking down of ATP molecules to produce energy
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
one of the processes that take place in the light-dependent stage of photosynthesis is the photolysis of water, i.e. the splitting of water molecules.
Source: Myschool Past Questions Archive (Record #62380)
Biology
WAEC / WASSCE 2021
Adaptation & Evolution
Diagram
The diagram above is an illustration of the foot of an animal.
The adaptation of this type of foot is that it is?
Attached Figure / Diagram
A
used as a bait to catch fish in water
B
used as a paddle for swimming
C
effective in scratching the soil for food
D
used for killing prey in water
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 #62381)
Biology
WAEC / WASSCE 2021
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
The following organisms are examples of carnivorous plants except.
A
gloriosa
B
venus flytrap
C
pitcher plant
D
Utricularia
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 #62382)
Biology
WAEC / WASSCE 2021
Reproduction in Plants & Animals
How many gametes are produced in the pollen grain of a flowering plant before fertilization?
A
one
B
two
C
three
D
four
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 #62373)
Biology
WAEC / WASSCE 2021
Reproduction in Plants & Animals
Which of the following organisms does not undergo incomplete metamorphosis?
A
locust
B
grasshopper
C
butterfly
D
cockroach
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 #62374)
Biology
WAEC / WASSCE 2021
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
An enzyme reaction may begin to decline when?
A
the optimum temperature is attained
B
the ph of the medium is altered
C
there is an increase in substrate concentration
D
the atmospheric pressure is altered
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 #62375)
Biology
WAEC / WASSCE 2021
Variety of Organisms & Classification of Living Things
Diagram
The diagram above is an illustration of the growth of a plant in a water culture. After a few days, the solution turned green and the plant died. Use this to answer this question.
What precaution should have been taken to prevent the solution from turning green?
Attached Figure / Diagram
A
use a non-green plant for the experiment
B
aerate the solution daily
C
cover the culture vessel with opaque paper
D
keep cotton wool around the seedling to make it dry
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 #62376)
Biology
WAEC / WASSCE 2021
Variety of Organisms & Classification of Living Things
Diagram
The diagram above is an illustration of the growth of a plant in a water culture. After a few days, the solution turned green and the plant died. Use this to answer this question.
The death of the plant was likely caused by?
Attached Figure / Diagram
A
excess supply of nutrients to the plant
B
inadequate supply of water to the plant
C
algal growth in the solution that used up the nutrients
D
inability of the plant to make food due to lack of sunlight
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 #62377)
Biology
WAEC / WASSCE 2021
Basic Ecological Concepts, Ecosystems & Biomes
Solution
Plants and animals of an ecosystem make up a?
A
habitat
B
succession
C
community
D
population
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
A community is a group of interacting organisms that may be of the same species or not as long as they share a common habitat.
Source: Myschool Past Questions Archive (Record #62383)
Biology
WAEC / WASSCE 2021
Basic Ecological Concepts, Ecosystems & Biomes
Rabbits cannot survive in an aquatic habitat because they have
A
no scales
B
no gills
C
fore limbs
D
lateral line
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 #62384)
Biology
WAEC / WASSCE 2021
Basic Ecological Concepts, Ecosystems & Biomes
The illustration below is a food chain.
Grass→grasshopper→domestic fowl→hawk
What would happen if the population of domestic fowl decreases?
A
grasshoppers would decrease
B
hawks would increase
C
grasshoppers would increase
D
grasses available to grasshoppers
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 #62385)
Biology
WAEC / WASSCE 2021
Adaptation & Evolution
Solution
Which of the following features is a characteristic of aquatic plants possession of ?
A
multiple epidermis
B
heavily lignified tissue
C
finely divided leaves
D
succulent stem
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Succulent stems are thick, fleshy stems that can store water. This is an important adaptation for aquatic plants as it helps them float and stay buoyant in the water. Additionally, succulent stems also help these plants store water during times of drought or when they are partially exposed to air.
Source: Myschool Past Questions Archive (Record #62386)