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Biology
UTME / JAMB 1993
Nervous, Hormonal Coordination & Sense Organs
Which path does sound entering the human ear follow?
A
Oval window → ossicles → ear drum
B
Ear drum → oval window → ossicles
C
Ear drum → ossicles → oval window
D
Ossicles → ear drum → oval window
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 #5277)
Biology
UTME / JAMB 1993
Basic Ecological Concepts, Ecosystems & Biomes
At which trophic level would the highest accumulation of a non-biodegradable substance occur?
A
Primary producers
B
Tertiary consumers
C
Primary consumers
D
Secondary consumers
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 #5288)
Biology
UTME / JAMB 1993
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
Two organisms of different species, living in close association but not dependent on each other are referred to as
A
parasites
B
commensals
C
symbionts
D
autotrophs
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Symbionts is the broad, overarching biological term for any two organisms of different species that live in a close, long-term physical association. This umbrella term encompasses relationships where partners are strictly dependent on each other (obligate symbiosis) as well as interactions where they can survive independently (facultative symbiosis).
Source: Myschool Past Questions Archive (Record #5289)
Biology
UTME / JAMB 1993
Basic Ecological Concepts, Ecosystems & Biomes
Which of the following instruments is NOT used in measuring abiotic factors in any habitat?
A
Microscopic
B
Thermometer
C
Hygrometer
D
Wind vane
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 #5290)
Biology
UTME / JAMB 1993
Population Ecology, Habitats & Conservation
Plants adapted for life in salty marsh are called
A
hydrophytes
B
xerophytes
C
halophytes
D
epiphytes
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 #5291)
Biology
UTME / JAMB 1993
Population Ecology, Habitats & Conservation
Which group of plants would be the first colonizers in an ecological succession changing rocks to soil?
A
Mosses
B
Ferns
C
Lichens
D
Grasses
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 #5292)
Biology
UTME / JAMB 1993
Population Ecology, Habitats & Conservation
Soil fertility can be conserved and renewed by
A
yearly monocropping
B
crop rotation and cover crops
C
bush burning to remove unwanted debris
D
avoiding artificial manures
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 #5293)
Biology
UTME / JAMB 1993
Basic Ecological Concepts, Ecosystems & Biomes
Solution
What ecological condition favours the breeding of black flies?
A
Fresh water habitat
B
Water in ponds and swamp
C
Water in small containers
D
Fast flowing streams
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
The ecological condition that favors the breeding of black flies is flowing water from rivers and streams to irrigation ditches.
Source: Myschool Past Questions Archive (Record #5294)
Biology
UTME / JAMB 1993
Transport System in Plants & Animals
Carbon monoxide poisons tissue by
A
constricting the blood vessels
B
killing the cells
C
combining with haemoglobin
D
rupturing the blood vessels
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 #5296)
Biology
UTME / JAMB 1993
Variation & Genetics (Heredity)
Which of the following is an example of discontinuous variation observed in man?
A
Skin colours
B
Tongue rolling
C
Body weight
D
Height
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 #5297)
Biology
UTME / JAMB 1993
Growth, Micro-organisms & Public Health
Solution
During blood transfusion, agglutination may occur when
A
contrasting antigens reacts with contrasting antibodies
B
similar antigens react with similar antibodies
C
two different antigens react with each other
D
two different antibodies react with each other
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Agglutination during blood transfusion occurs when:
- Red blood cells from the donor have antigens on their surface that are different from the recipient's antigens.
- The recipient's immune system recognizes these foreign antigens and produces antibodies against them.
- The antibodies bind to the antigens on the donor's red blood cells, causing them to clump together (agglutinate).
This reaction can lead to serious complications, including hemolysis (red blood cell destruction) and even death. To prevent this, blood types are carefully matched before transfusion.
Source: Myschool Past Questions Archive (Record #5298)
Biology
UTME / JAMB 1993
Variation & Genetics (Heredity)
Diagram
Solution
In the illustration above, the genotypes of the offsprings are
Attached Figure / Diagram
A
1 heterozygous smooth : 2 homozygous smooth : 1 wrinkled
B
1 homozygous smooth : 2 heterozygous smooth : 1 wrinkled
C
2 homozygous smooth : 2 wrinkled
D
3 heterozygous smooth : 2 wrinkled
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
The diagram above refers to a PUNNETT SQUARE used in predicting the probable genotypic and phenotypic ratios of a cross. looking at the diagram, we have the ratio
SS : Ss : sS : ss and from the question, we see the genotypic composition is;
1 homozygous smooth : 2 heterozygous smooth : 1 wrinkled
Source: Myschool Past Questions Archive (Record #5306)
Biology
UTME / JAMB 1993
Adaptation & Evolution
Cold blooded animals are referred to as
A
poikilothermic
B
homothermic
C
polythermic
D
homeostatic
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 #5307)
Biology
UTME / JAMB 1993
Variety of Organisms & Classification of Living Things
Solution
Which of the following organisms has lost the pentadactyl limb structure?
A
Bat
B
Fish
C
Frog
D
Pigeon
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Pentadactyl limb structure is found in amphibians, humans, birds and reptiles. However, fishes have lost their pentadactyl limb structure.
Source: Myschool Past Questions Archive (Record #5310)
Biology
WAEC / WASSCE 1993
Cell Structure, Organization & Cell Division
The organ which is sensitive to light in Euglena is the
A
gullet
B
chloroplast
C
eye spot
D
contractile vacuole
E
flagellum
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 #16620)