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Biology
WAEC / WASSCE 2007
Basic Ecological Concepts, Ecosystems & Biomes
The effect of chlorofluorocarbon is
A
reduction of oxygen concentration in the atmosphere
B
depletion of the ozone layer
C
screening of ultra violet rays
D
increase in carbon dioxide concentration
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 #20945)
Biology
WAEC / WASSCE 2007
Population Ecology, Habitats & Conservation
The order of primary succession by plants in a very dry habitat is?
A
xerophytes → mesophytes shrub
B
mesophytes → xerophytes → shrub
C
mesophytes → shrub -> xerophytes
D
xerophytes → shrub → mesophytes
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 #20946)
Biology
WAEC / WASSCE 2007
Population Ecology, Habitats & Conservation
Solution
A population which exceeds its carrying capacity and then collapses is represented graphically as a?
A
bell shaped curve
B
skewed curve
C
s-shape curve
D
linear curve
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
S-shaped growth curve(sigmoid growth curve) A pattern of growth in which, in a new environment, the population density of an organism increases slowly initially, in a positive acceleration phase; then increases rapidly, approaching an exponential growth rate but then declines in a negative acceleration phase until at zero growth rate the population stabilizes.
Source: Myschool Past Questions Archive (Record #20947)
Biology
WAEC / WASSCE 2007
Growth, Micro-organisms & Public Health
Solution
Which of the following infections would not respond to an antibiotic treatment?
A
Gonorrhoea
B
Measles
C
Diarrhoea
D
Tuberculosis
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Measles is an infectious illness caused by the rubeola virus. It spreads either through direct contact with a person who has the virus or through droplets in the air. Measles is a highly contagious disease that can lead to life-threatening complications.
The others are caused by Bacteria which can treated using antibiotics
Source: Myschool Past Questions Archive (Record #20948)
Biology
WAEC / WASSCE 2007
Growth, Micro-organisms & Public Health
The vector of the sleeping sickness disease parasite is the
A
cockroach
B
mosquito
C
black fly
D
tse-tse fly
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 #20949)
Biology
WAEC / WASSCE 2007
Basic Ecological Concepts, Ecosystems & Biomes
Which of the following bacteria lives in the root nodules of leguminous plants?
A
Azotobacter
B
Nitrobacter
C
Rhizobium
D
Nitrosomonas
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 #20950)
Biology
WAEC / WASSCE 2007
Variety of Organisms & Classification of Living Things
Endangered species are organisms that ought to be
A
hunted
B
killed
C
poached
D
protected
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 #20951)
Biology
WAEC / WASSCE 2007
Variety of Organisms & Classification of Living Things
Which of the following substances is not a conservable natural resource?
A
Minerals
B
fire
C
Soil
D
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 #20952)
Biology
WAEC / WASSCE 2007
Population Ecology, Habitats & Conservation
Solution
Which of the following actions do not reflect the objectives of conservation of natural resources?
A
Protection of the ecosystem
B
Saving some species from extinction
C
Elimination of some wild animals to enable others survive
D
Prevention of indiscriminate killing of organism
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
The objective of conservation is to ensure the preservation, protection, and management of all natural resources and biodiversity. Conservation aims to maintain ecological balance and prevent the loss of any species. The elimination of a species—even if intended to help another—directly contradicts these principles as it results in a loss of biodiversity and can disrupt the complex interactions within an ecosystem.
Source: Myschool Past Questions Archive (Record #20953)
Biology
WAEC / WASSCE 2007
Variation & Genetics (Heredity)
Which of the following forms of variation will give a normal distribution?
A
Blood groups
B
Tongue rolling
C
Body weight
D
Finger prints
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 #20954)
Biology
WAEC / WASSCE 2007
Variety of Organisms & Classification of Living Things
Two tall plants were crossed; some of their offsprings were tall and others short the possible genotypes of the parent plants were
A
TT and TT
B
TT and tt
C
Tt and Tt
D
Tt and TT
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 #20960)
Biology
WAEC / WASSCE 2007
Variation & Genetics (Heredity)
The character that is manifested in an organism in the presence of a contrasting character is known as
A
genotype
B
phenotype
C
recessive
D
dominant
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 #20961)
Biology
WAEC / WASSCE 2007
Variation & Genetics (Heredity)
What is the probability of producing a child of blood group O by a woman of blood group O and a man of blood group A?
A
25%
B
5 %
C
75%
D
100%
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 #20962)
Biology
WAEC / WASSCE 2007
Variation & Genetics (Heredity)
An albino man marries a normal woman (homozygous for skin pigmentation). What is the probability that the people could have an albino child?
A
0%
B
0.5%
C
25%
D
60%
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 #20963)
Biology
WAEC / WASSCE 2007
Variation & Genetics (Heredity)
If a cross between a red-flowered plant and a white-flowered plant produced red-flowered plants, the result can be described as an example of
A
partial recessiveness
B
dominance
C
incomplete dominance
D
out-breeding
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 #20964)