POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2020 Biology | Objective

Are you preparing for POST UTME JOSEPH AYO BABALOLA UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2020 Biology (Objective) questions designed to simulate the real exam environment.

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Question 1
In a tropical rainforest e\cosystem, the primary consumers are primarily herbivores that feed on the abundant plant life. Which of the following is a characteristic of these primary consumers?
Correct A. They have a high metabolic rate to quickly digest their food
B. They have a low metabolic rate to conserve energy
C. They are primarily carnivores that feed on other animals
D. They are detritivores that feed on dead plant material

Correct Answer: A

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Question 2
A species of plant has a reproductive strategy that involves producing large numbers of seeds. Which of the following is a benefit of this reproductive strategy?
A. Increased genetic diversity
B. Reduced competition for resources
Correct C. Improved chances of survival and reproduction
D. Increased risk of disease and predation

Correct Answer: C

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Question 3
In a xylem vessel, water is transported from the roots to the leaves through a process called
A. osmosis
B. diffusion
C. transpiration
Correct D. capillary action

Correct Answer: D

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Question 4
The process of evolution is driven by the accumulation of
A. mutations
B. natural selection
C. genetic drift
Correct D. all of the above

Correct Answer: D

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Question 5
A microorganism that causes disease in humans is an example of a
Correct A. pathogen
B. parasite
C. symbiont
D. mu\tant

Correct Answer: A

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Question 6
In a photosynthetic pathway, what is the primary function of the enzyme RuBisCO?
Correct A. Fixation of CO2
B. Reduction of NADP+
C. Regeneration of RuBP
D. Oxidation of NADPH

Correct Answer: A

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Question 7
A population of Drosophila melanogaster is being studied for its response to selection pressure. Which of the following is an example of a stabilizing selection?
A. Selection for a tall phenotype
B. Selection for a short phenotype
Correct C. Selection for a medium phenotype
D. Selection for a dark-colored phenotype

Correct Answer: C

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Question 8
A diagram of the human kidney is shown below. What is the primary function of the renal pelvis?
A. Filtering waste from the blood
B. Regulating blood pressure
Correct C. Concentrating urine
D. Storing urine

Correct Answer: C

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Question 9
A diagram of the human eye is shown below. What is the primary function of the lens?
Correct A. Focu\sing light on the retina
B. Regulating pupil size
C. Detecting light intensity
D. Transmitting visual signals to the brain

Correct Answer: A

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Question 10
A diagram of the human heart is shown below. What is the primary function of the atrioventricular (AV) node?
A. Regulating heart rate
Correct B. Conducting electrical impulses
C. Pumping blood to the lungs
D. Pumping blood to the body

Correct Answer: B

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Question 11
In a photosynthetic pathway, which of the following is the primary electron acceptor in the light-dep\endent reactions?
Correct A. P680
B. P700
C. FAD
D. NADP+

Correct Answer: A

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Question 12
A cell undergoing mitosis has a nucleus with 4 chromosomes. What is the total number of chromosomes in the daughter cells after mitosis?
A. 8
Correct B. 16
C. 32
D. 64

Correct Answer: B

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Question 13
A researcher isolates a microorganism that is capable of degrading plastic. Which of the following enzymes is most likely responsible for this process?
A. Lipase
B. Protease
C. Amylase
Correct D. Polymerase

Correct Answer: D

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Question 14
A population of rabbits is growing exponentially. If the initial population size is 100 and the growth rate is 20% per year, what is the population size after 5 years?
A. 1610
B. 1620
Correct C. 1630
D. 1640

Correct Answer: C

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Question 15
A diagram of a cell membrane is shown below. Which of the following molecules is most likely to be embedded in the phospholipid bilayer?
Correct A. Phospholipid
B. Protein
C. Carbohydrate
D. Lipid

Correct Answer: A

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Question 16
In a desert e\cosystem, a cactus plant (Cereus giganteus) has a unique adaptation to conserve water. Which of the following is the primary mechanism by which this adaptation occurs?
Correct A. CAM (Crassulacean Acid Metabolism) photosynthesis
B. CAM (Crassulacean Acid Metabolism) respiration
C. CAM (Crassulacean Acid Metabolism) transpiration
D. CAM (Crassulacean Acid Metabolism) assimilation

Correct Answer: A

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Question 17
A species of bird (Passer domesticus) has a unique mating behavior. Which of the following is the primary reason for this behavior?
Correct A. Territorial defense
B. Mating competition
C. Parental care
D. Food caching

Correct Answer: A

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Question 18
A species of fish (Salmo salar) has a unique adaptation to navigate through its environment. Which of the following is the primary mechanism by which this adaptation occurs?
Correct A. Lateral line system
B. Statocysts
C. Pit organs
D. Barbels

Correct Answer: A

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Question 19
A species of plant (Arabidopsis thaliana) has a unique adaptation to respond to its environment. Which of the following is the primary mechanism by which this adaptation occurs?
Correct A. Phototropism
B. Hydrotropism
C. Thigmotropism
D. Gravitropism

Correct Answer: A

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Question 20
A species of animal (Canis lupus) has a unique adaptation to hunt its prey. Which of the following is the primary mechanism by which this adaptation occurs?
Correct A. Pack hunting
B. Stalking
C. Ambush
D. Chase

Correct Answer: A

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Question 21
The process of reproduction in which an organism produces offspring that are genetically identical to itself is known as _______.
Correct A. Asexual reproduction
B. Sexual reproduction
C. Binary fission
D. Mitosis

Correct Answer: A

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Question 22
The diagram below shows the structure of a plant root. Which part of the root is responsible for absorbing water and minerals from the soil?
A. A
Correct B. B
C. C
D. D

Correct Answer: B

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Question 23
The nervous system is responsible for _______.
A. Regulating body temperature
B. Controlling blood pressure
Correct C. Coordinating movements and sensations
D. Producing hormones

Correct Answer: C

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Question 24
The xylem is responsible for transporting _______ from the roots to the leaves.
Correct A. Water and minerals
B. Sugars and amino acids
C. Hormones and waste products
D. Oxygen and carbon dioxide

Correct Answer: A

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Question 25
The diagram below shows the structure of a human eye. Which part of the eye is responsible for focu\sing light onto the retina?
A. A
Correct B. B
C. C
D. D

Correct Answer: B

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