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Biology
WAEC / WASSCE 2009
Variation & Genetics (Heredity)
The allele responsible for sickle-cell anaemia first appeared in the tropical and subtropical regions of Asia, the Middle
East and Africa. It entered the United States of America when individuals were forcibly brought over from Africa. In micro-
evolutionary terms this is an example of
A
mutation
B
gene flow
C
genetic drift
D
natural selection
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 #21475)
Biology
WAEC / WASSCE 2009
Variation & Genetics (Heredity)
Which of the following diseases is not hereditary?
A
Albinism
B
Scabies
C
Haemophilia
D
Colour blindness
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 #21476)
Biology
WAEC / WASSCE 2009
Cell Structure, Organization & Cell Division
The immediate product of meiosis in flowering plants is the
A
sporophyte
B
gametophyte
C
zygote
D
pollen grain
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 #21477)
Biology
WAEC / WASSCE 2009
Cell Structure, Organization & Cell Division
DNA in eukaryotic cells is contained in the
A
central vacuole
B
nucleus
C
lysosome
D
Golgi body
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 #21478)
Biology
WAEC / WASSCE 2009
Variation & Genetics (Heredity)
A man who is heterozygous for the disease haemophilia marries a woman who is double recessive for haemophilia. What percentage of their offspring would have the disease?
A
0%
B
25%
C
50%
D
75%
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 #21479)
Biology
WAEC / WASSCE 2009
Reproduction in Plants & Animals
A dairy farmer allowed only his best milk producing cows to mate. In succeeding generations of cows: milk production increased. This outcome is an example of
A
artificial selection
B
natural selection
C
competition
D
cross fertilization.
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 #21480)
Biology
WAEC / WASSCE 2009
Cell Structure, Organization & Cell Division
Solution
Cytokinesis of mitosis is a process that ensures that
A
each daughter cells gets the necessary organelles
B
there is distribution of a complete set of genes into each daughter cell
C
daughter cells inherit new genetic combinations.
D
worn out organelles are excluded from daughter cells
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
The main purpose of cytokinesis in mitosis is to physically divide the cytoplasm of a single cell into two separate daughter cells, effectively completing the cell division process by ensuring each new cell receives a complete set of organelles and genetic material after the nucleus has divided during mitosis.
Source: Myschool Past Questions Archive (Record #21481)
Biology
WAEC / WASSCE 2009
Adaptation & Evolution
An animal which is active during the day is known as
A
nocturnal animal
B
diurnal animal
C
terrestrial animal
D
homoiothermic animal
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 #21482)
Biology
WAEC / WASSCE 2009
Variation & Genetics (Heredity)
Solution
Evidence for evolution include the following except?
A
fossil records
B
Comparative anatomy
C
mutation of genes
D
geographical distribution of genes
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
A mutation is a change in DNA, the hereditary material of life. An organism's DNA affects how it looks, how it behaves, and its physiology.
So a change in an organism's DNA can cause changes in all aspects of its life.
Mutations are essential to evolution; they are the raw material of genetic variation.
Source: Myschool Past Questions Archive (Record #21483)
Biology
UTME / JAMB 2009
Respiration & Gaseous Exchange
Diagram
Solution
Use the diagram above to answer this question.
The structure that controls loss of water vapour during transpiration is labelled
Attached Figure / Diagram
A
l
B
ll
C
lll
D
lV
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Stomata regulate gas exchange between the plant and environment and control of water loss by changing the size of the stomatal pore.
Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata.
Source: Myschool Past Questions Archive (Record #31216)
Biology
UTME / JAMB 2009
Growth, Micro-organisms & Public Health
Diagram
Solution
Use the diagram above to answer this question.
The part labelled l is the
Attached Figure / Diagram
A
spongy mesophyll
B
upper epidemis
C
cuticle
D
vein
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Plant cuticle is the outermost layer of plants, which covers leaves, fruits, flowers, and non-woody stems of higher plants.
It protects plants against drought, extreme temperatures, UV radiation, chemical attack, mechanical injuries, and pathogen/pest infection.
Source: Myschool Past Questions Archive (Record #31217)
Biology
UTME / JAMB 2009
Digestive System & Feeding Mechanisms
Diagram
Solution
Use the diagram above to answer this question.
Emulsification of fats takes place in the part labelled?
Attached Figure / Diagram
A
l
B
ll
C
lll
D
lV
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Fat emulsification is the process of increasing the surface area of fats in the small intestine by grouping them into small clusters.
This is the responsibility of bile, a liquid created by the liver and stored in the gallbladder. Actual digestion of the fats is then accomplished by lipase, an enzyme from the pancreas
Source: Myschool Past Questions Archive (Record #31218)
Biology
UTME / JAMB 2009
Digestive System & Feeding Mechanisms
Diagram
Solution
Use the diagram above to answer this question.
The content of the part labelled lll is usually?
Attached Figure / Diagram
A
neutral
B
alkaline
C
acidic
D
saline
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Stomach acid's low pH level is largely attributable to one ingredient: hydrochloric acid (HCl).
Source: Myschool Past Questions Archive (Record #31225)
Biology
UTME / JAMB 2009
Excretion & Homeostasis
Diagram
Solution
Use the diagram above to answer this question.
The zone of physiological stress is represented by?
Attached Figure / Diagram
A
l and ll
B
ll only
C
ll and lll
D
l and lll
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Physiological stress can be defined as any external or internal condition that challenges the homeostasis of a cell or an organism.
It can be divided into three different aspects: environmental stress, intrinsic developmental stress, and aging.
That zone is option D
Source: Myschool Past Questions Archive (Record #31237)
Biology
UTME / JAMB 2009
Variety of Organisms & Classification of Living Things
Diagram
Solution
Use the diagram above to answer this question.
The optimum temperature for the growth of the organism is
Attached Figure / Diagram
A
25oC
B
50oC
C
75oC
D
100oC
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Zone II is the area representing the growth zone. And it starts from 25\(^0\)C and attains maximum temperature at the peak which is 50\(^0\)C.
Source: Myschool Past Questions Archive (Record #31239)