POST UTME WELLSPRING UNIVERSITY 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a human eye is shown below. Identify the part labeled 'B'.
A. Cornea
B. Iris
C. Retina
D. Lens
Question 2
A 0.5-molar solution of HCl is mixed with a 0.2-molar solution of NaOH. What is the resulting pH?
A. 1
B. 2
C. 3
D. 4
Question 3
What is the term for the process by which microorganisms, such as bacteria, become resis\tant to antibiotics?
A. Antibiotic resis\tance
B. Antibiotic sensitivity
C. Bacterial mutation
D. Bacterial transformation
Question 4
In the context of evolutionary theories, what is the primary mechanism by which natural selection acts on genetic variation?
A. Genetic drift
B. Gene flow
C. Mutation
D. Differential reproduction
Question 5
A diagram of the xylem and phloem tissues in a plant is shown below. What is the primary function of the xylem?
A. Transport of water and minerals
B. Transport of sugars and amino acids
C. Support and storage
D. Protection from pathogens
Question 6
A 2.5-liter solution contains 1.8 liters of ethanol and 0.7 liters of water. What is the mole \fraction of ethanol?
A. 0.72
B. 0.80
C. 0.88
D. 0.96
Question 7
In the context of eco\logical succession, what is the term for the process by which a community of organisms becomes more complex and diverse over time?
A. Primary succession
B. Secondary succession
C. Eco\logical climax
D. Eco\logical stability
Question 8
A population of 1000 individuals has a mean height of 170 cm and a s\tandard deviation of 10 cm. If a sample of 50 individuals is randomly selected from this population, what is the probability that the sample mean height will be greater than 175 cm?
A. 0.0563
B. 0.0572
C. 0.0581
D. 0.0590
Question 9
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
A. Random mating
B. No mutation
C. No gene flow
D. No natural selection
Question 10
What is the primary mechanism by which the nervous system coordinates the body's response to a stimulus?
A. Synaptic transmission
B. Neurotransmitter release
C. Action potential propagation
D. Muscle contraction
Question 11
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Mitochondria
B. Chloroplast
C. Vacuole
D. Nucleus
Question 12
A diagram of a simple food chain is shown below. What is the role of the producer in this e\cosystem?
A. Primary consumer
B. Secondary consumer
C. Decomposer
D. Producer
Question 13
In asexual reproduction, what is the primary mechanism by which genetic variation is introduced?
A. Mutation
B. Genetic recombination
C. Gene duplication
D. Gene deletion
Question 14
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population size is 1000, what is the expected number of homozygous recessive individuals?
A. 200
B. 400
C. 600
D. 800
Question 15
In the process of cellular respiration, what is the primary function of the mitochondria?
A. Synthesis of ATP
B. Breakdown of glu\cose
C. Transport of ions
D. Regulation of cell growth

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