Biology 2013 Jamb Examination
Biology 2013 Jamb Examination
Question 11
Which of the following structure is adapted for feeding in a bird of prey?
Birds of prey have hooked beaks and sharp claws to tear flesh and catch prey efficiently. These adaptations enable effective hunting, feeding, and survival in their carnivorous lifestyle.
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Question 12
The eye defect caused by the development of cloudy areas in the lens is
Cataract is the clouding of the eye's lens, reducing vision clarity. It is common in aging and may result from injury, diabetes, or prolonged exposure to UV light, requiring surgical removal for treatment.
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Question 13
A pollutant that is biodegradable is
Sewage is biodegradable because microorganisms can break it down into simpler substances. Unlike heavy metals or crude oil, it decomposes naturally, reducing environmental accumulation and pollution over time.
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Question 14
A tropical disease caused by Trypanosoma is
Sleeping sickness is caused by Trypanosoma brucei transmitted by the tsetse fly. It affects the central nervous system, leading to neurological symptoms and is prevalent in parts of sub-Saharan Africa.
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Question 15
The solid part of the ecosystem is referred to as the
The lithosphere refers to the Earth's solid crust, forming the land component of ecosystems. It provides the substrate for plants, animals, and microbial life and interacts with other spheres to support ecosystems.
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Question 16
Which of the following is caused by Treponema pallidum?
Treponema pallidum is a spirochete bacterium responsible for syphilis, a sexually transmitted infection. It affects multiple body systems if untreated and is identified through serological tests and clinical symptoms.
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Question 17
The gland that is found just below the hypothalamus is the
The pituitary gland is located below the hypothalamus and is termed the 'master gland' because it secretes hormones controlling other endocrine glands and regulates growth, metabolism, and reproductive processes.
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Question 18
The most important plant hormone is
Auxin is a key plant hormone responsible for cell elongation, apical dominance, root formation, and tropic responses. It is vital for plant growth regulation and adaptation to environmental stimuli.
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Question 19
The sensory cell that responds to dim light is referred to as the
Rods are photoreceptor cells in the retina specialized for low-light vision. They enable night vision but do not detect color, unlike cones, which are responsible for color vision in bright light.
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Question 20
The absence of anti-diuretic hormone in humans results in
Anti-diuretic hormone (ADH) regulates water reabsorption in kidneys. Its absence leads to excessive water loss in urine, causing increased dehydration and potentially resulting in a condition known as diabetes insipidus.
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The ages of three men are in the ratio 3:4:5. If the difference between the ages of the oldest and youngest is 18 years, find the sum of the ages of the three men.
These questions are based on William Shakespeare's Romeo and Juliet.
'Farewell.- God knows when we shall meet again, I have a faint cold fear thrills through my veins,
That almost freezes up the heat of life.
I'll call them back again to comfort me.
Nurse!-What should she do here?
My dismal scene I need must act alone. Come, vial'.
The intention of the speaker above is to