POST UTME UNIPORT 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the context of evolutionary theory, what is the primary mechanism by which genetic drift leads to the loss of genetic variation in a population?
A. Genetic recombination
B. Mutation
C. Gene flow
D. Genetic drift
Question 2
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. 0.36
B. 0.64
C. 0.72
D. 0.84
Question 3
A researcher is studying the effects of climate change on the distribution of a particular species of bird. Which of the following statistical methods would be most appropriate for analyzing the data?
A. Regression analysis
B. Analysis of variance (ANOVA)
C. Correlation coefficient
D. Time-series analysis
Question 4
A 50 mL sample of a solution containing 0.1 M glu\cose is titrated with 0.1 M HCl. What is the pH of the solution after 25 mL of HCl has been added?
A. 1
B. 2
C. 3
D. 4
Question 5
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 0.2 m from its equilibrium position and released from rest. What is the maximum speed of the block?
A. 1.5 m/s
B. 2.0 m/s
C. 2.5 m/s
D. 3.0 m/s
Question 6
A plant is placed in a greenhouse with a temperature of 25°C. What will happen to the plant?
A. The plant will grow faster
B. The plant will grow slower
C. The plant will remain unchanged
D. The plant will die
Question 7
In the context of classification of living things, which of the following is an example of a characteristic that is used to distinguish between prokaryotic and eukaryotic cells?
A. Presence of a true nucleus
B. Presence of mitochondria
C. Presence of a cell wall
D. Presence of ribosomes
Question 8
The diagram below shows a cross-section of a plant root. What is the function of the structure labeled 'A'?
A. Absorption of water
B. Transport of nutrients
C. Storage of starch
D. Regulation of pH
Question 9
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' 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. 0.04
Question 10
A patient is experiencing symptoms of a neuro\logical disorder. Which of the following types of cells is most likely responsible for the development of this disorder?
A. Neurons
B. Astrocytes
C. Microglia
D. Oligod\endrocytes
Question 11
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'TT'. What is the probability that the offspring will have the genotype 'tt'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 12
A plant cell is placed in a solution containing 0.1 M glu\cose. If the cell membrane is permeable to glu\cose, what will be the net movement of glu\cose molecules into the cell?
A. From the solution into the cell
B. From the cell into the solution
C. No net movement
D. Dep\ends on the concentration gradient
Question 13
A 50 mL sample of a 0.5 M solution of HCl is added to 100 mL of a 0.1 M solution of NaOH. What is the concentration of the resulting solution?
A. 0.05 M
B. 0.075 M
C. 0.10 M
D. 0.125 M
Question 14
A 2.5 L container holds 2.0 L of a 0.1 M solution of NaCl. What is the concentration of the solution after adding 0.5 L of water?
A. 0.05 M
B. 0.075 M
C. 0.10 M
D. 0.125 M
Question 15
A diagram of the xylem and phloem tissues in a plant stem is shown below.
A. The xylem tissue is responsible for transporting water and minerals from the roots to the leaves.
B. The phloem tissue is responsible for transporting sugars and other organic compounds from the leaves to the rest of the plant.
C. The xylem tissue is responsible for transporting sugars and other organic compounds from the leaves to the rest of the plant.
D. The phloem tissue is responsible for transporting water and minerals from the roots to the leaves.

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