POST UTME GREENFIELD UNIVERSITY 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of the human eye is shown below. What is the function of the part labeled 'C'?
A. To focus light on the retina.
B. To regulate the amount of light entering the eye.
C. To produce tears.
D. To detect motion.
Question 2
The diagram below shows the structure of a plant root. Which of the following is a function of the root hair?
A. To absorb water and minerals from the soil
B. To store food for the plant
C. To support the plant's structure
D. To produce hormones for the plant
Question 3
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
A. 0.3
B. 0.4
C. 0.5
D. 0.6
Question 4
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
A. 0.64
B. 0.36
C. 0.16
D. 0.04
Question 5
A diagram of the human sense organ is shown below.
A. The cornea is the transparent outer layer of the eye.
B. The retina is the innermost layer of the eye.
C. The eye is the sense organ that detects light.
D. The cornea is the innermost layer of the eye.
Question 6
A plant with the genotype 'AaBb' is crossed with a plant with the genotype 'AaBb'. What is the probability that the offspring will have the genotype 'AABB'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 7
A species of plant has a unique adaptation that allows it to survive in environments with high levels of salt. Which of the following physio\logical changes would most likely be responsible for this adaptation?
A. Increased salt excretion through the roots
B. Increased salt storage in the leaves
C. Increased salt tolerance through the use of specialized enzymes
D. Increased salt avoidance through the use of specialized roots
Question 8
A species of fish has a unique adaptation that allows it to survive in low-oxygen environments. Which of the following physio\logical changes would most likely be responsible for this adaptation?
A. Increased myoglobin levels to store oxygen
B. Increased hemoglobin levels to increase oxygen-carrying capacity
C. Increased mitochondrial density to increase energy production
D. Increased anaerobic metabolism to produce energy without oxygen
Question 9
The process of photosynthesis in plants involves the conversion of light energy into chemical energy. Which of the following is a byproduct of photosynthesis?
A. Oxygen
B. Carbon dioxide
C. Water
D. Glu\cose
Question 10
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype?
A. 0.36
B. 0.64
C. 0.16
D. 0.24
Question 11
A researcher is studying the effect of temperature on the rate of respiration in plants. Which of the following is a correct statement about the relationship between temperature and respiration rate?
A. Respiration rate increases with increa\sing temperature.
B. Respiration rate decreases with increa\sing temperature.
C. Respiration rate remains cons\tant with increa\sing temperature.
D. Respiration rate increases up to a certain temperature and then decreases.
Question 12
A diagram of the human respiratory system is shown below.
A. The trachea is a tube that connects the lungs to the mouth.
B. The diaphragm is a muscle that separates the chest cavity from the abdominal cavity.
C. The lungs are organs that are responsible for exchanging oxygen and carbon dioxide.
D. The trachea is a tube that connects the lungs to the nose.
Question 13
In a tropical rainforest e\cosystem, the primary consumers are primarily herbivores that feed on the abundant plant life. Which of the following adaptations would be most beneficial for these herbivores to survive in this environment?
A. Large body size to intimidate predators
B. Specialized digestive system to break down cellulose in plant cell walls
C. Camouflage to avoid detection by predators
D. Strong legs for rapid escape from predators
Question 14
A diagram of the human digestive system is shown below. Identify the part labeled A.
A. Esophagus
B. Stomach
C. Small intestine
D. Large intestine
Question 15
A diagram of the human respiratory system is shown below. What is the function of the part labeled 'E'?
A. To filter the air.
B. To warm the air.
C. To exchange gases.
D. To expand and contract during breathing.

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