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Biology
WAEC / WASSCE 2010
Variation & Genetics (Heredity)
In a family of eight (8) all the children are girls Which of the following reasons correctly explains this?
A
The woman cannot produce male children
B
The man has a low sperm count
C
The Y component of the man’s sex chromosome was always involved
D
The X component of the man’s sex chromosome was always involved.
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 #21535)
Biology
WAEC / WASSCE 2010
Cell Structure, Organization & Cell Division
Which of the following statements is correct about the structure of a chromosome? A chromosome consists of
A
two chromatids joined at the centromere
B
Two chromatids joined at the spindle
C
Two chromatin threads joined at the centrioles
D
thread-like structures not joined together
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 #21536)
Biology
WAEC / WASSCE 2010
Variation & Genetics (Heredity)
Mr. Andrew, his wife and child belong to blood groups A, B and O respectively. The genotypes of both parents are
A
IA IO and IB IB
B
IA IA and IB IB
C
IA IB and IA IO
D
IA IO and IB IO.
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 #21537)
Biology
WAEC / WASSCE 2010
Variation & Genetics (Heredity)
What would be the phenotypic ratio of the offspring of a cross between a heterozygous dominant parent and a double recessive parent?
A
1 : 2: 1
B
1 : 1
C
3 :1
D
2 : 1
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 #21538)
Biology
WAEC / WASSCE 2010
Variety of Organisms & Classification of Living Things
The percentage probability that a normal male married to a carrier woman would have a haemophilic male child is
A
35%.
B
50%
C
75%
D
100%.
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 #21539)
Biology
WAEC / WASSCE 2010
Reproduction in Plants & Animals
The importance of courtship in animals includes the following except
A
ensuring that the female chooses the right male species
B
arousing both male and female partners
C
protection of territory
D
to coincide with the ovulation period and ensure fertilization
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 #21540)
Biology
WAEC / WASSCE 2010
Adaptation & Evolution
Solution
In evolution, analogous structures are significant because they show
A
physiological diversity
B
functional diversity
C
genetic diversity
D
structural diversity
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Analogous structures are defined as biological structures having similar or corresponding functions but not from the same evolutionary origin.
Source: Myschool Past Questions Archive (Record #21541)
Biology
WAEC / WASSCE 2010
Adaptation & Evolution
Which of the following statements reflects the mechanism of natural selection?
A
There are variations within every species
B
Individuals of every species are genetically identical
C
No organism in a species dies before sexual maturity
D
Organisms with selective advantages are less likely to survive
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 #21542)
Biology
WAEC / WASSCE 2010
Variety of Organisms & Classification of Living Things
Which of the following animals exhibits territoriality?
A
Rabbit
B
Earthworm
C
Lizard
D
Toad
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 #21543)
Biology
UTME / JAMB 2010
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
When a mixture of a food substance and Benedict's solution was warmed, the solution changed from blue to brick-red. This indicates the presence of?
A
reducing sugar
B
fatty acid
C
sucrose
D
amino acid
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
During a water bath, which is usually 4–10 minutes, the solution of the mixture and Benedict's solution should progress in the colors of blue (with no reducing sugar present), orange, yellow, green, red, and then brick red precipitate or brown (with high reducing sugar present). A color change would signify the presence of a reducing sugar.
Source: Myschool Past Questions Archive (Record #29590)
Biology
UTME / JAMB 2010
Transport System in Plants & Animals
Solution
The primary structure responsible for pumping blood for circulation through the mammalian circulatory systems is the?
A
veins
B
right auricle
C
arteries
D
left ventricle
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.
Source: Myschool Past Questions Archive (Record #29591)
Biology
UTME / JAMB 2010
Transport System in Plants & Animals
Solution
Circulation of blood to all parts of the body except the lungs is through?
A
the pulmonary artery
B
systemic circulation
C
the lymphatic system
D
pulmonary circulation
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
The systemic circulation is the part of the vascular system that carries blood from the left ventricle to organs and tissues of the body.
Pulmonary circulation moves blood between the heart and the lungs. It transports deoxygenated blood to the lungs to absorb oxygen and release carbon dioxide.
Source: Myschool Past Questions Archive (Record #29592)
Biology
UTME / JAMB 2010
Variety of Organisms & Classification of Living Things
Yeast respires anaerobically to convert simple sugar to carbon (IV) oxide and?
A
alcohol
B
acid
C
oxygen
D
water
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 #29593)
Biology
UTME / JAMB 2010
Respiration & Gaseous Exchange
The sheet of muscle that separates the thoracic and the abdominal cavities is the?
A
diaphragm
B
intercostal muscle
C
pleural memberane
D
pericardium
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 #29594)
Biology
UTME / JAMB 2010
Excretion & Homeostasis
Solution
The oily substance that lubricates the mammalian hair to keep it flexible and water repellent is secreted by the?
A
sweat glands
B
sebaceous glands
C
fatty cells
D
granular layer
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
The normal function of sebaceous glands is to produce and secrete sebum, a group of complex oils including triglycerides and fatty acid breakdown products, wax esters, squalene, cholesterol esters and cholesterol. Sebum lubricates the skin to protect against friction and makes it more impervious to moisture.
Source: Myschool Past Questions Archive (Record #29595)