Biology 2020 Jamb Examination
Biology 2020 Jamb Examination
Question 31
The noticeable adaptation of the animal to it's aquatic habitat is the possession of
Webbed digits are a significant adaptation for aquatic animals, providing increased surface area that facilitates swimming and efficient movement in water, enhancing survival in aquatic habitats.
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Question 32
Paternity disputes can most accurately be resolved through the use of
DNA analysis allows for precise identification of genetic relationships between individuals. It compares sequences from the child and potential father, providing near-certain resolution of paternity disputes.
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Question 33
Use the table below to answer the question.
High relative humidity will be expected in Zones
| Ecological Zone | Temparature(°C) | Rainfall (mm) |
|---|---|---|
| I | 45 | 300 |
| II | 32 | 2000 |
| III | 30 | 2,200 |
| IV | 15 | 800 |
High relative humidity will be expected in Zones
Relative humidity is higher in areas with abundant rainfall. Zones II and III have the highest rainfall (2000mm and 2200mm), which contributes to elevated moisture in the air, leading to high humidity.
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Question 34
Use the table to answer the question.
Which of the zones is likely to be a desert?
| Ecological Zone | Temparature(°C) | Rainfall (mm) |
|---|---|---|
| I | 45 | 300 |
| II | 32 | 2000 |
| III | 30 | 2,200 |
| IV | 15 | 800 |
Which of the zones is likely to be a desert?
Deserts are characterized by extremely high temperatures and very low rainfall. Zone I has 45°C and only 300mm of rainfall, which aligns with typical desert conditions, making it the most arid.
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Question 35
When bacteria swim from cold to warm regions, this is known as
Positive thermotaxis is the directed movement of organisms toward warmer regions. Bacteria exhibit this behavior to seek optimal temperatures for metabolic activity and survival.
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Question 36
The only caste in the termite colony whose members can feed themselves are the
Worker termites are responsible for feeding themselves and other members of the colony. They forage, process food, and support the survival and maintenance of the colony structure.
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Question 37
Which of the following is the best explanation for a child who is phenotypically short and born of two tall parents?
Even tall parents may carry recessive alleles for short stature. If a child inherits these alleles from both parents, the child will express the recessive phenotype of being short.
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Question 38
Which of the following vertebrates has the most simple structured heart
Fish have the simplest heart structure among vertebrates, consisting of two chambers: one atrium and one ventricle, which ensures unidirectional blood flow through gills for oxygenation.
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Question 39
Use the diagram to answer the question.
The type of protective adaption exhibited by the animal is
Countershading colorations involve darker dorsal surfaces and lighter ventral surfaces, helping the animal blend with the environment and reduce visibility to predators, enhancing survival.
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Question 40
Use the diagram to answer the question.
The structure labelled i is
The structure labeled i is tactile, allowing the animal to sense touch and pressure. This sense is crucial for detecting environmental stimuli and responding to potential threats.