POST UTME UNILORIN 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the context of eco\logy, what is the primary function of a keystone species?
A. To regulate the population of other species
B. To provide a source of food for other species
C. To create a habitat for other species
D. To maintain the balance of the e\cosystem
Question 2
A plant with the genotype RrSs is crossed with a plant with the genotype RrSS. What is the probability that the offspring will have the genotype RrSs?
A. 0.25
B. 0.5
C. 0.75
D. 1.0
Question 3
A 2.5 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.15 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, what is the maximum speed of the block?
A. 0.5 m/s
B. 1.0 m/s
C. 1.5 m/s
D. 2.0 m/s
Question 4
A 10 mL sample of a solution containing 0.5 M NaCl is diluted to 50 mL. What is the concentration of the solution after dilution?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 5
A population of bacteria is growing exponentially with a growth rate of 0.05/h. If the initial population is 1000 bacteria, what is the population after 3 hours?
A. 1000
B. 2000
C. 5000
D. 10000
Question 6
A 2.5 kg block is attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 0.5 m from its equilibrium position, what is the potential energy stored in the spring?
A. 12.5 J
B. 25 J
C. 37.5 J
D. 50 J
Question 7
The xylem is a type of vascular tissue found in plants. Which of the following is a function of the xylem?
A. Transport of sugars
B. Transport of water
C. Transport of minerals
D. Transport of gases
Question 8
A 5-liter solution contains 3 moles of glu\cose (C6H12O6) and 2 moles of fructose (C6H12O6). What is the concentration of glu\cose in the solution?
A. 0.3 M
B. 0.6 M
C. 0.9 M
D. 1.2 M
Question 9
A 2.5 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.25 m from its equilibrium position and released from rest. What is the maximum speed of the block?
A. 0.5 m/s
B. 1.25 m/s
C. 2.5 m/s
D. 5 m/s
Question 10
A solution containing 0.1 M glu\cose and 0.2 M fructose is separated by a semipermeable membrane. If the osmotic pressure of the solution is 1.5 atm, what is the concentration of the solute on the other side of the membrane?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 11
In a tropical rainforest e\cosystem, the primary consumers are primarily herbivores that feed on the abundant vegetation. However, some primary consumers are known to be carnivores. What is the most likely reason for this adaptation?
A. To avoid competition with other herbivores for food resources
B. To exploit a new food source and increase energy intake
C. To reduce predation pressure from carnivorous predators
D. To adapt to changing environmental conditions
Question 12
The classification of living things is based on the following characteristics: cell structure, metabolism, and genetic makeup. Which of the following is an example of a eukaryotic cell?
A. Bacteria
B. Archaea
C. Plant cell
D. Animal cell
Question 13
The theory of evolution by natural selection is supported by the fossil record, which shows a clear pattern of gradual changes over time. Which of the following is an example of a transitional fossil?
A. Tiktaalik
B. Archaeopteryx
C. Mammal-like reptile
D. Bird-like dinosaur
Question 14
A species of fish has a unique mating ritual where the male fish builds a complex nest to attract a female. What is the most likely reason for this behavior?
A. To establish dominance over other males
B. To demonstrate genetic fitness to potential mates
C. To signal the availability of food resources
D. To communicate with other fish in the school
Question 15
In the cell cycle, what is the purpose of the G2 phase?
A. DNA replication
B. Cell growth
C. Preparation for cell division
D. Mitosis

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