10 questions from the JAMB 2019 Biology paper, with answers and explanations. Tap "Show answer" under each one when you are ready.
JAMB 2019Question 1 · Animal Biology and Comparative Physiology
Which of the following statement about the similarities in plant and animal transport is correct?
A.Materials and hormones are transported in fluid form
B.The transport medium is made up of only tissues
C.Their materials are transported in the same vessels
D.Diffusion is not required
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Answer: A. Materials and hormones are transported in fluid form
In both plants and animals, materials and hormones are transported in fluid form (sap or blood/lymph).
JAMB 2019Question 2 · Cell Biology and Biochemistry
Which of the following substances has the highest amount of energy in joules per unit weight?
A.Carbohydrates
B.Fats
C.Proteins
D.Vitamins
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Answer: B. Fats
Fats contain the highest amount of energy per unit weight compared to carbohydrates, proteins, or vitamins.
JAMB 2019Question 3 · Ecology and Environment
The period of inactivity seen in some animals during long period of heat or drought is
A.Migration
B.Aestivation
C.Hibernation
D.Adaptation
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Answer: B. Aestivation
Aestivation is the period of inactivity/dormancy some animals undergo during long periods of heat or drought.
JAMB 2019Question 4 · Ecology and Environment
Trees in Savanna habitats usually have thick bark which mainly.
A.Reduces the rate of transpiration
B.Protect them from scorching sun
C.Protect them from heavy winds
D.Resist bush fires
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Answer: D. Resist bush fires
Thick bark on savanna trees mainly helps them resist damage from the frequent bush fires common in that habitat.
JAMB 2019Question 5 · Ecology and Environment
Which of the following factors is not considered in a terrestial habitat?
A.Temperature
B.Sunlight
C.Humidity
D.Turbidity
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Answer: D. Turbidity
Turbidity is a factor relevant to aquatic habitats (measuring water clarity), not terrestrial habitats.
JAMB 2019Question 6 · Genetics and Evolution
The sum total of adaptive changes from pre-existing form that have taken place over a long time resulting in diversity of forms, structures and functions among organism is referred to as
A.Specification
B.Inorganic Evolution
C.Evolution
D.Organic Evolution
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Answer: D. Organic Evolution
Organic evolution refers to the sum of adaptive changes over long periods resulting in the diversity of forms, structures, and functions among living organisms.
JAMB 2019Question 7 · Genetics and Evolution
In the theory of use and disuse Lamarck proposed that evolution occurred because of the following except
A.There is natural selection of offspring
B.There is great changes in the environment
C.Organism develop specialised characters
D.The characters are inheritable
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Answer: A. There is natural selection of offspring
Natural selection of offspring is Darwin's concept, not part of Lamarck's theory of use and disuse.
JAMB 2019Question 8 · Mammalian Physiology and Anatomy
Which of the following controls all voluntary actions
A.Olfactory lobes
B.Cerebrum
C.Hypothalamus
D.Pons varolii
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Answer: B. Cerebrum
The cerebrum controls all voluntary actions in the body.
JAMB 2019Question 9 · Microbiology and Disease
Viruses are pathogens of the following diseases except
A.Tuberculosis
B.Measles
C.Small pox
D.Poliomyelitis
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Answer: A. Tuberculosis
Tuberculosis is caused by a bacterium, not a virus, unlike measles, small pox, and poliomyelitis which are viral diseases.
JAMB 2019Question 10 · Plant Biology
Which of the following essential substance is contained in vegetable?
A.Chlorophyll
B.Glucose
C.Mineral Salts
D.Carbon dioxide
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Answer: A. Chlorophyll
Vegetables contain chlorophyll, the green pigment used in photosynthesis.
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