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Biology
WAEC / WASSCE 2015
Variety of Organisms & Classification of Living Things
Which of the following organisms is not a protozoan?
A
Amoeba
B
Ascaris
C
Plasmodium
D
Paramecium
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 #45341)
Biology
WAEC / WASSCE 2015
Reproduction in Plants & Animals
A plant that commonly undergoes vegetative propagation by means of leaves is
A
Hibiscus
B
Bryophylum
C
Crotalaria
D
Spirogyra
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 #45388)
Biology
WAEC / WASSCE 2015
Transport System in Plants & Animals
Solution
Blood pressure is higher in the arteries as a result of
A
stress
B
contraction and relaxation
C
blockage in the arteries
D
presence of valves
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Blood pressure is higher in arteries than in veins because arteries directly receive blood pumped from the heart under high pressure, and their thick, elastic walls are designed to accommodate this pressure. Because the space in the arteries is narrower, the same amount of blood passing through them increases the blood pressure. Veins can constrict to reduce their capacity to hold blood, forcing more blood into the arteries. As a result, blood pressure increases.
In summary, contraction and relaxation are responsible for the high blood pressure in arteries.
Source: Myschool Past Questions Archive (Record #45389)
Biology
WAEC / WASSCE 2015
Nervous, Hormonal Coordination & Sense Organs
A farmer who wants to keep seeds for three years before planting and wants to prevent them from sprouting uses
A
auxin
B
gibberellins
C
abscisin
D
cytokinins
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 #45390)
Biology
WAEC / WASSCE 2015
Supporting Tissues & Skeletal System
A person had an accident that affected the skull but not the nose and later lost the sense of smell. The accident must have a affected the
A
nose by extension
B
olfactory lobes of the brain
C
passage from the nose to the brain
D
part of the skull near the nose
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 #45391)
Biology
WAEC / WASSCE 2015
Nervous, Hormonal Coordination & Sense Organs
Ability of the human eye to focus images accurately on the retina is called
A
astigmatism
B
myopia
C
adjustment
D
accommodation
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 #45392)
Biology
WAEC / WASSCE 2015
Basic Ecological Concepts, Ecosystems & Biomes
Which of the following processes removes carbon (IV) oxide from the atmosphere?
A
Burning fuels
B
Putrefaction
C
Photosynthesis
D
Respiration in plants
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 #45393)
Biology
WAEC / WASSCE 2015
Reproduction in Plants & Animals
Which of the following characteristic features is not associated with monocotyledonous plants?
A
Well differentiated sepals and petals
B
Presence of fibrous root system
C
Presence of narrow leaves
D
Flora parts are in multiples of three
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 #45394)
Biology
WAEC / WASSCE 2015
Variety of Organisms & Classification of Living Things
The main difference between a seed and a fruit is that a fruit
A
is large while a seed is small
B
has two scars while a seed is has one
C
is pigmented while a seed is not
D
can be dispersed by animals while a seed cannot
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 #45395)
Biology
WAEC / WASSCE 2015
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
A student used the following steps in testing for a non-reducing sugar.
I. added Benedict's solution to the sugar solution
ll. added dilute hydrochloric acid to the sugar and boiled it;
lll. added sodium hydroxide solution to the solution in ll. and boiled;
IV. added Benedict's solution to the cooled solution in lll.
Use this information above to answer the question.
Why did the student add the dilute hydrochloric acid to the sugar solution in step ll? To
A
oxidize the sugar solution
B
hydrolyse the sugar solution
C
dry the sugar solution
D
increase the volume of the sugar solution
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 #45401)
Biology
WAEC / WASSCE 2015
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
A student used the following steps in testing for a non-reducing sugar.
I. added Benedict's solution to the sugar solution
ll. added dilute hydrochloric acid to the sugar and boiled it;
lll. added sodium hydroxide solution to the solution in ll. and boiled;
IV. added Benedict's solution to the cooled solution in lll.
Use this information above to answer the question.
What is the importance of step ll in the testing process? To
A
neutralize the sugar solution
B
soften the sugar solution
C
change the colour of the sugar solution
D
increase the acid content of the sugar solution
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Dilute hydrochloric acid (HCl) is added to a non-reducing sugar solution and then boiled to hydrolyze (break down) the glycosidic bonds that link the monosaccharide units, converting the non-reducing sugar into reducing sugars, which can then react with Benedict's reagent. The HCl provides the acidic environment necessary for this hydrolysis to occur efficiently while heating accelerates the hydrolysis reaction, ensuring that the non-reducing sugar is broken down into its constituent monosaccharides (reducing sugars).
Source: Myschool Past Questions Archive (Record #45403)
Biology
WAEC / WASSCE 2015
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
A student used the following step in testing for a non-reducing sugar.
I. added Benedict's solution to the sugar solution
II. added dilute hydrochloric acid to the sugar solution and boiled it
III. added sodium hydroxide solution to the solution in II and boiled;
IV. added Benedict's solution to the cooled solution in III.
The colour change to be observed in step IV is
A
blue-black
B
brick-red
C
purple
D
violet
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
A positive test with Benedict's reagent is shown by a color change from clear blue to a brick-red precipitate.
Source: Myschool Past Questions Archive (Record #45406)
Biology
WAEC / WASSCE 2015
Digestive System & Feeding Mechanisms
Which of the following organs of the alimentary canal is not correctly matched with its function?
A
Gall bladder- stores bile
B
Liver - stores glycogen
C
Appendix - releases enzymes
D
Teeth = grind food
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 #45411)
Biology
WAEC / WASSCE 2015
Digestive System & Feeding Mechanisms
A person suffering from obstruction of the bile duct is advised not to eat fats and oil because
A
bile digests fats and oil
B
fats and oil can only be absorbed whenbile is absent
C
bile emulsifies fat and oil
D
bile adds water to digesting food
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 #45423)
Biology
WAEC / WASSCE 2015
Variety of Organisms & Classification of Living Things
A community reaches a climax when
A
only pioneer organisms are present
B
new habitats are constantly being formed
C
there is an introduction of new plants and animal species within the community
D
the composition and size of a community remains constant over a long period
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 #45424)