POST UTME VERITAS UNIVERSITY 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the context of the xylem transport system, what is the primary function of the tracheids?
A. To transport water and minerals from the roots to the leaves
B. To transport sugars and amino acids from the leaves to the roots
C. To provide structural support to the plant
D. To regulate gas exchange between the plant and the atmosphere
Question 2
In the context of osmoregulation, what is the primary function of the hormone vasopres\sin in the kidneys?
A. To increase water reabsorption in the collecting ducts
B. To decrease water reabsorption in the collecting ducts
C. To increase sodium reabsorption in the proximal convoluted tubule
D. To decrease sodium reabsorption in the distal convoluted tubule
Question 3
In the context of excretion, what is the primary function of the kidneys in maintaining acid-base balance?
A. To regulate the pH of the blood by adjusting the concentration of hydrogen ions
B. To eliminate excess hydrogen ions from the body
C. To maintain the balance of electrolytes in the body
D. To regulate the concentration of oxygen in the blood
Question 4
A researcher is studying the effect of temperature on the rate of a chemical reaction. The researcher measures the rate of the reaction at different temperatures and obtains the following data:
A. The rate increases with increa\sing temperature.
B. The rate decreases with increa\sing temperature.
C. The rate remains cons\tant with increa\sing temperature.
D. The rate is unaffected by temperature.
Question 5
A plant cell is placed in a solution with a high concentration of sucrose. What will happen to the cell's turgor pressure?
A. It will decrease due to water loss
B. It will increase due to water uptake
C. It will remain the same
D. It will decrease due to solute uptake
Question 6
In the context of eco\logy, what is the term for the process by which plants convert light energy into chemical energy?
A. Photosynthesis
B. Respiration
C. Decomposition
D. Fermentation
Question 7
A diagram of the human brain is shown below. What is the function of the part labeled 'B'?
A. To regulate body temperature
B. To control voluntary movements
C. To process sensory information
D. To produce hormones
Question 8
A solution of glu\cose is placed in a dialysis bag and submerged in a solution of urea. What is the expected movement of water molecules?
A. Water molecules will move from the solution of urea into the dialysis bag
B. Water molecules will move from the dialysis bag into the solution of urea
C. Water molecules will remain unchanged
D. Water molecules will move equally in both directions
Question 9
A researcher is studying the genetic variation in a population of Drosophila melanogaster. Which of the following genetic concepts would be most relevant to this study?
A. Genetic drift
B. Natural selection
C. Gene flow
D. Mutation
Question 10
A genetic cross between two organisms results in a 9:3:3:1 ratio of phenotypes. What is the genotype of the parents?
A. Both parents are homozygous dominant
B. One parent is homozygous dominant and the other is homozygous recessive
C. Both parents are heterozygous
D. One parent is homozygous dominant and the other is heterozygous
Question 11
A diagram of a neuron is shown below. What is the function of the structure labeled 'B'?
A. synapse
B. axon
C. d\endrite
D. cell body
Question 12
A plant cell is placed in a solution with a high concentration of sucrose. What is the expected effect on the cell's turgor pressure?
A. The cell will experience a decrease in turgor pressure
B. The cell will experience an increase in turgor pressure
C. The cell will remain unchanged
D. The cell will experience a decrease in cell volume
Question 13
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'Rr'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 14
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
A. To focus light onto the retina
B. To detect changes in light intensity
C. To regulate the amount of light entering the eye
D. To produce tears to lubricate the eye
Question 15
A population of 1000 rabbits is introduced to a new island. The population grows according to the \logistic growth model \( \frac{dP}{dt} = rP \left\( 1 - \frac{P}{K} \right \), where \( r = 0.1 \) and \( K = 2000 \). Find the population size at time \( t = 10 \) years.
A. 1200
B. 1500
C. 1800
D. 2000

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