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Free JAMB Past Question for biology
Q.1A sex-linked character mentioned in the syllabus is:
A. Tongue rolling
B. Phenylthiocarbamide (PTC) taste
C. Haemophilia
D. Fingerprints
A sex-linked character mentioned in the syllabus is:
A. Tongue rolling
B. Phenylthiocarbamide (PTC) taste
C. Haemophilia
D. Fingerprints
Correct Answer: option c
Further reading: Sex-linked Characters
Show explanation
Haemophilia, along with baldness and color blindness, is listed as a sex-linked character
Q.2The part of the mammalian circulatory system that carries blood away from the heart is the:
A. Vein
B. Capillary
C. Artery
D. Aorta
The part of the mammalian circulatory system that carries blood away from the heart is the:
A. Vein
B. Capillary
C. Artery
D. Aorta
Correct Answer: option c
Further reading: Channels for Transportation
Show explanation
The mammalian circulatory system includes arteries, which carry blood away from the heart. The aorta is a major artery, while veins carry blood towards the heart.
Q.3The process of transmission of hereditary characters from parents to offspring is accounted for by the segregation of genes at meiosis and their recombination at:
A. Mitosis
B. Fertilization
C. Transcription
D. Replication
The process of transmission of hereditary characters from parents to offspring is accounted for by the segregation of genes at meiosis and their recombination at:
A. Mitosis
B. Fertilization
C. Transcription
D. Replication
Correct Answer: option b
Further reading: Chromosomes and Heredity
Show explanation
The transmission of hereditary characters from parents to offspring occurs through the segregation of genes at meiosis and the recombination of genes at fertilization
Q.4The application of discontinuous variation is useful in:
A. Measuring height and weight
B. Crime detection
C. Observing colour patterns
D. Plotting frequency distribution graphs
The application of discontinuous variation is useful in:
A. Measuring height and weight
B. Crime detection
C. Observing colour patterns
D. Plotting frequency distribution graphs
Correct Answer: option b
Further reading: Application of Discontinuous Variation
Show explanation
Discontinuous variation can be used in crime detection
Q.5An organism that carries out autotrophic nutrition is a:
A. Sheep
B. Roundworm
C. Sundew plant
D. Rhizopus
An organism that carries out autotrophic nutrition is a:
A. Sheep
B. Roundworm
C. Sundew plant
D. Rhizopus
Correct Answer: option c
Further reading: Modes of Nutrition
Show explanation
The sundew plant is an example of a carnivorous plant, a type of autotroph. Holozoic nutrition is seen in sheep, parasitic in roundworms, and saprophytic in Rhizopus.
Q.6A plant showing a deficiency symptom of nitrogen would likely exhibit symptoms similar to a deficiency in:
A. Calcium
B. Potassium
C. Sulfur
D. Magnesium
A plant showing a deficiency symptom of nitrogen would likely exhibit symptoms similar to a deficiency in:
A. Calcium
B. Potassium
C. Sulfur
D. Magnesium
Correct Answer: option b
Further reading: Plant Mineral Requirements
Show explanation
Candidates are expected to recognize the deficiency symptoms of nitrogen, phosphorus, and potassium
Q.7The mechanism of transportation involving the movement of water across a semi-permeable membrane is known as:
A. Diffusion
B. Plasmolysis
C. Osmosis
D. Turgidity
The mechanism of transportation involving the movement of water across a semi-permeable membrane is known as:
A. Diffusion
B. Plasmolysis
C. Osmosis
D. Turgidity
Correct Answer: option c
Further reading: Mechanisms of Transportation
Show explanation
Osmosis is described as a mechanism of transportation in organisms, along with diffusion, plasmolysis, and turgidity
Q.8A variation that is not influenced by environmental conditions is a:
A. Continuous variation
B. Discontinuous variation
C. Physiological variation
D. Morphological variation
A variation that is not influenced by environmental conditions is a:
A. Continuous variation
B. Discontinuous variation
C. Physiological variation
D. Morphological variation
Correct Answer: option b
Further reading: Variation
Show explanation
Candidates should be able to differentiate between continuous and discontinuous variations, and relate the role of environmental conditions to variation. Discontinuous variation is not typically influenced by the environment.
Q.9Which of the following factors contributes to the loss of soil fertility?
A. Crop rotation
B. Use of organic fertilizers
C. Leaching
D. Terracing
Which of the following factors contributes to the loss of soil fertility?
A. Crop rotation
B. Use of organic fertilizers
C. Leaching
D. Terracing
Correct Answer: option c
Further reading: Loss of Soil Fertility
Show explanation
Factors such as leaching, erosion of the topsoil, and repeated cropping with one variety contribute to the loss of soil fertility
Q.10Which of the following organisms represents the tissue level of organization?
A. Paramecium
B. Onion bulb
C. Chlamydomonas
D. Hydra
Which of the following organisms represents the tissue level of organization?
A. Paramecium
B. Onion bulb
C. Chlamydomonas
D. Hydra
Correct Answer: option d
Further reading: Levels of Organization
Show explanation
Hydra is an example of an organism at the tissue level of organization. Paramecium and Chlamydomonas are unicellular organisms at the cell level, while the onion bulb is an example of an organ
Q.11The behavior of basking in lizards is an adaptation for:
A. Protection
B. Securing mates
C. Regulating body temperature
D. Conserving water
The behavior of basking in lizards is an adaptation for:
A. Protection
B. Securing mates
C. Regulating body temperature
D. Conserving water
Correct Answer: option c
Further reading: Behavioral Adaptations
Show explanation
Basking in lizards is a behavioral adaptation that helps in regulating body temperature
Q.12Which of the following is a medium of transportation in a multicellular animal?
A. Cell sap
B. Cytoplasm
C. Blood
D. Turgor pressure
Which of the following is a medium of transportation in a multicellular animal?
A. Cell sap
B. Cytoplasm
C. Blood
D. Turgor pressure
Correct Answer: option c
Further reading: Media of Transportation
Show explanation
Blood is a medium of transportation in organisms, along with cytoplasm, cell sap, and lymph.
Q.13The regulation of body temperature, salt, and water levels in the body is a process known as:
A. Co-ordination
B. Respiration
C. Homeostasis
D. Excretion
The regulation of body temperature, salt, and water levels in the body is a process known as:
A. Co-ordination
B. Respiration
C. Homeostasis
D. Excretion
Correct Answer: option c
Further reading: Homeostasis
Show explanation
Homeostasis includes the regulation of body temperature and the regulation of salt and water
Q.14The practice of using methods like contour ridging and terracing is aimed at:
A. Increasing soil porosity
B. Renewing and maintaining soil fertility
C. Conserving natural resources
D. Preventing desertification
The practice of using methods like contour ridging and terracing is aimed at:
A. Increasing soil porosity
B. Renewing and maintaining soil fertility
C. Conserving natural resources
D. Preventing desertification
Correct Answer: option d
Further reading: Conservation
Show explanation
The benefits of conserving natural resources include the prevention of desertification
Q.15A non-living factor affecting the distribution of organisms is:
A. Competition
B. Predation
C. Rainfall
D. Symbiosis
A non-living factor affecting the distribution of organisms is:
A. Competition
B. Predation
C. Rainfall
D. Symbiosis
Correct Answer: option c
Further reading: Abiotic Factors
Show explanation
Rainfall is an abiotic factor that affects the distribution of organisms, along with temperature, relative humidity, and wind speed
Q.16The respiratory surface in an earthworm is the:
A. Gill
B. Body surface
C. Trachea
D. Stomata
The respiratory surface in an earthworm is the:
A. Gill
B. Body surface
C. Trachea
D. Stomata
Correct Answer: option b
Further reading: Respiratory Organs and Surfaces
Show explanation
The body surface is a respiratory organ, along with gills, tracheae, lungs, stomata, and lenticels. Earthworms use their body surface for gas exchange.
Q.17A disease that is commonly transmissible and endemic in some regions, whose spread is favored by ecological conditions, is:
A. AIDS
B. Polio
C. Malaria
D. Syphilis
A disease that is commonly transmissible and endemic in some regions, whose spread is favored by ecological conditions, is:
A. AIDS
B. Polio
C. Malaria
D. Syphilis
Correct Answer: option c
Further reading: Diseases
Show explanation
Malaria is listed as a common endemic and potentially epidemic disease whose spread is favored by ecological conditions
Q.18Warning coloration is a specific type of adaptive coloration. It is demonstrated by:
A. Snakes
B. Fish
C. Toads
D. Mushrooms
Warning coloration is a specific type of adaptive coloration. It is demonstrated by:
A. Snakes
B. Fish
C. Toads
D. Mushrooms
Correct Answer: option d
Further reading: Adaptive Coloration
Show explanation
Warning coloration is categorized in mushrooms, while countershading is seen in fish, toads, and snakes
Q.19The adaptations for obtaining food are examined in the mouth-parts of insects such as the:
Options:
A. Stick insect
B. Praying mantis
C. Butterfly
D. Toad
The adaptations for obtaining food are examined in the mouth-parts of insects such as the:
Options:
A. Stick insect
B. Praying mantis
C. Butterfly
D. Toad
Correct Answer: option c
Further reading: Adaptations for Obtaining Food
Show explanation
The mouthparts of insects, especially the mosquito, butterfly, and moth, are structural adaptations for obtaining food
Q.20Population density is defined as:
A. The total number of organisms in a habitat
B. The number of organisms per unit area
C. The number of births per year
D. The number of deaths per year
Population density is defined as:
A. The total number of organisms in a habitat
B. The number of organisms per unit area
C. The number of births per year
D. The number of deaths per year
Correct Answer: option b
Further reading: Population Density
Show explanation
Population density is defined as the number of organisms per unit area