POST UTME BABCOCK UNIVERSITY 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The equation of a curve is given by \( y = \frac{1}{x} \). What is the value of ( y ) when \( x = 2 \)?
A. 0.5
B. 1
C. 2
D. 4
Question 2
A 5.0-mL sample of a solution containing 0.10 M HCl is added to a 10.0-mL sample of a solution containing 0.20 M NaOH. What is the concentration of the resulting solution?
A. 0.020 M
B. 0.040 M
C. 0.060 M
D. 0.080 M
Question 3
The type of tissue that is found in the walls of blood vessels is known as?
A. Epithelial tissue
B. Connective tissue
C. Muscle tissue
D. Nervous tissue
Question 4
A 2.0-mL sample of a solution containing 0.10 M NaCl is added to a 10.0-mL sample of a solution containing 0.20 M NaOH. What is the concentration of the resulting solution?
A. 0.020 M
B. 0.040 M
C. 0.060 M
D. 0.080 M
Question 5
In a tropical rainforest e\cosystem, the primary consumers are primarily composed of which of the following groups?
A. Herbivorous insects
B. Fruit-eating birds
C. Small mammals
D. Carnivorous fish
Question 6
A study on the growth of a population found that the population size increased by 20% in the first year and by 15% in the second year. What is the total percentage increase in population size over the two-year period?
A. 35%
B. 40%
C. 45%
D. 50%
Question 7
The sense organs in the human body are responsible for detecting stimuli from the environment. Which of the following sense organs is responsible for detecting light and color?
A. Eye
B. Ear
C. Nose
D. Tongue
Question 8
In the context of evolutionary theory, what is the term for the process by which a new species emerges from an existing one?
A. Speciation
B. Adaptation
C. Mutation
D. Genetic drift
Question 9
The process by which water moves through a plant, from the roots to the leaves, is known as?
A. Transpiration
B. Respiration
C. Photosynthesis
D. Osmosis
Question 10
A study on the genetic variation of a population found that the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the dominant allele 'A'?
A. 0.8
B. 0.6
C. 0.4
D. 0.2
Question 11
The nervous system is responsible for transmitting signals from the brain to the rest of the body. Which of the following structures is responsible for transmitting signals from the sensory receptors to the spinal cord?
A. Dorsal root ganglion
B. Spinal cord
C. Cerebral cortex
D. Brainstem
Question 12
A diagram of the human eye is shown below. Identify the part labeled A.
A. Cornea
B. Iris
C. Lens
D. Retina
Question 13
The process by which plants convert light energy into chemical energy is known as?
A. Respiration
B. Photosynthesis
C. Transpiration
D. Osmosis
Question 14
The graph below shows the relationship between the concentration of a solution and its osmotic pressure. What is the equation of the line of best fit?
A. \( P = \frac{nRT}{V} \)
B. \( P = \frac{V}{nRT} \)
C. \( P = \frac{nRT}{V^2} \)
D. \( P = \frac{V^2}{nRT} \)
Question 15
The process of osmoregulation in animals involves the regulation of water and salt balance in the body. Which of the following is a key mechanism used by the kidneys to excrete excess salt?
A. Active transport of sodium ions
B. Passive diffusion of water molecules
C. Filtration of blood plasma
D. Secretion of antidiuretic hormone

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