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Biology
UTME / JAMB 2012
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
Which of the following organisms is both parasitic and autotrophic?
A
Sundew
B
Loranthus
C
Rhizopus
D
Tapeworm
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Loranthus is considered a hemiparasite, meaning it's both parasitic and autotrophic, as it can photosynthesize but also relies on its host tree for water and minerals.
Loranthus plants grow on the branches of woody trees and have specialized structures called haustoria that penetrate the host's bark to absorb water and minerals. Despite its parasitic nature, Loranthus retains the ability to perform photosynthesis, meaning it can produce its own food using sunlight, carbon dioxide, and water.
Source: Myschool Past Questions Archive (Record #29725)
Biology
UTME / JAMB 2012
Digestive System & Feeding Mechanisms
A function of the hydrochloric acid produced in the human stomach during digestion is to
A
neutralise the effect of bile
B
coagulate milk protein and emulsify fats
C
stop the action of ptyalin
D
break up food into smaller particles
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 #29726)
Biology
UTME / JAMB 2012
Variety of Organisms & Classification of Living Things
Which of the following is a polysaccharide?
A
Glucose
B
Sucrose
C
Maltose
D
Cellulose
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 #29728)
Biology
UTME / JAMB 2012
Excretion & Homeostasis
In the kidney of mammals, the site of ultrafiltration is the
A
uriniferous tubule
B
Bowman's capsule
C
loop of Henle
D
renal tubule
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 #29729)
Biology
UTME / JAMB 2012
Supporting Tissues & Skeletal System
Which of the following is involved in secondary thickening in plants?
A
Collenchyma and xylem cells
B
Vascular cambium
C
Cork cambium and sclerenchyma
D
Vascular cambium and cork cambium
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 #29731)
Biology
UTME / JAMB 2012
Reproduction in Plants & Animals
An example of a fruit that develops from a single carpel is
A
okro
B
tomato
C
bean
D
orange
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 #29732)
Biology
UTME / JAMB 2012
Nervous, Hormonal Coordination & Sense Organs
Solution
Plant growth can be artificially stimulated by the addition of
A
gibberellin
B
kinin
C
abscisic acid
D
ethylene
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Auxin, cytokinin, and gibberellin are plant hormones that promote plant growth. Ethylene and abscisic acid (ABA) are plant hormones that inhibit plant growth.
Auxin: Promotes cell elongation, organ formation, and differentiation. Auxin is responsible for the overall growth of plants, including stem elongation and root growth.
Cytokinin: Responsible for cell division in meristematic tissues. Cytokinins are located in the root and shoot tips of plants.
Gibberellin: Responsible for stem, root, and seed growth. Dwarf plants can be treated with gibberellins to promote stem growth.
Ethylene: Responsible for the aging of plants. Ethylene is a gas that is released from ripening fruit.
Abscisic acid (ABA): Responsible for the dormancy of different organs such as the lateral buds and seeds of plants.
Source: Myschool Past Questions Archive (Record #29734)
Biology
UTME / JAMB 2012
Nervous, Hormonal Coordination & Sense Organs
The autonomic nervous system consists of neurons that control the
A
voluntary muscles
B
heart beat
C
tongue
D
hands
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 #29735)
Biology
UTME / JAMB 2012
Basic Ecological Concepts, Ecosystems & Biomes
The water cycle is maintained mainly by
A
evaporation of water in the environment
B
evaporation and condensation of water in the environment
C
condensation of water in the environment
D
transpiration and respiration in plants
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 #29737)
Biology
UTME / JAMB 2012
Basic Ecological Concepts, Ecosystems & Biomes
Plants of temperate origin can be grown in tropical areas in the vegetation zones of the
A
rain forest
B
guinea savanna
C
sudan savanna
D
montane forest
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 #29738)
Biology
UTME / JAMB 2012
Basic Ecological Concepts, Ecosystems & Biomes
Solution
The abiotic factors that control human population include
A
disease and famine
B
space and rainfall
C
flooding and earthquake
D
temperature and disease
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Flooding and earthquakes are examples of abiotic factors that control the human population.
Source: Myschool Past Questions Archive (Record #29745)
Biology
UTME / JAMB 2012
Digestive System & Feeding Mechanisms
An indigenous method of renewing and maintaining soil fertility is by
A
clearing farms by burning
B
planting one crop type
C
adding inorganic fertilizers yearly
D
crop rotation and shifting cultivation
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 #29746)
Biology
UTME / JAMB 2012
Growth, Micro-organisms & Public Health
The diseases caused by water-borne pathogens include
A
gonorrhoea and poliomyelitis
B
typhoid and syphilis
C
tuberculosis and cholera
D
typhoid and cholera
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 #29747)
Biology
UTME / JAMB 2012
Variation & Genetics (Heredity)
Which of the following is true in blood transfusion?
A
person of blood group AB can donate blood only to another person of blood group AB
B
persons of blood groups A and B can donate or receive blood from each other
C
A person of blood group AB acn receive blood only from persons of blood group A or B
D
A person of blood group O can donate only to a person of blood group O
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 #29748)
Biology
UTME / JAMB 2012
Variation & Genetics (Heredity)
A yellow maize is planted and all the fruits obtained are of yellow seeds. When they are croos-bred, yellow seeds and white seeds are obtained in a ratio 3:1 . The yellow seed is said to be
A
non-heritable
B
sex-linked
C
a recessive trait
D
a dominant trait
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 #29750)