POST UTME CHRISTOPHER UNIVERSITY 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A population of a species is found to have a high degree of genetic variation. Which of the following is a likely consequence of this genetic variation?
A. The population is more likely to adapt to changing environments
B. The population is less likely to adapt to changing environments
C. The population is more likely to go extinct
D. The population is less likely to go extinct
Question 2
A 50 mL sample of a 0.1 M glu\cose solution is diluted to 100 mL. What is the new concentration of glu\cose?
A. 0.05 M
B. 0.1 M
C. 0.2 M
D. 0.5 M
Question 3
A diagram of the human skeletal system is shown below. Which part of the skeletal system is responsible for protecting the brain?
A. Vertebral column
B. Ribcage
C. Skull
D. Pelvis
Question 4
A diagram of a human eye is shown below. Identify the part responsible for adjusting the size of the pupil.
A. Cornea
B. Iris
C. Retina
D. Lens
Question 5
A diagram of a human heart is shown below. Which of the following is the primary function of the atria?
A. Pumping blood from the lungs to the rest of the body
B. Pumping blood from the rest of the body to the lungs
C. Regulating the heart's rhythm
D. Supporting the heart's structure
Question 6
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. 180
B. 200
C. 220
D. 240
Question 7
A plant cell has a vacuole that is 10 μm in diameter. If the cell membrane is 7.5 nm thick, what is the surface area of the vacuole?
A. 0.00015 m^2
B. 0.0003 m^2
C. 0.00045 m^2
D. 0.0006 m^2
Question 8
The nervous system is responsible for transmitting signals between different parts of the body. Which of the following types of neurons is responsible for transmitting signals from sensory receptors to the central nervous system?
A. Motor neurons
B. Sensory neurons
C. Interneurons
D. Glial cells
Question 9
A diagram of a human nervous system is shown below. Identify the structure labeled 'B'.
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal cord
Question 10
In the context of plant growth and development, what is the primary function of auxins?
A. To promote cell elongation
B. To promote cell division
C. To promote cell differentiation
D. To promote cell death
Question 11
A population of bacteria is growing according to the exponential growth model. If the initial population size is 100 and the growth rate is 0.05, what is the population size after 5 generations?
A. 500
B. 750
C. 900
D. 950
Question 12
In the context of plant growth and development, what is the primary function of auxins?
A. To promote cell elongation and cell division
B. To inhibit cell elongation and cell division
C. To regulate stomatal opening and clo\sing
D. To control root growth and development
Question 13
A plant with the genotype AaBbCcc is crossed with a plant with the genotype AabbDdEe. What is the probability that the offspring will have the genotype AaBbCc?
A. 0.25
B. 0.5
C. 0.75
D. 1
Question 14
A patient is diagnosed with a bacterial infection. The bacteria are gram-positive and have a characteristic 'chain of beads' appearance under the microscope. What is the most likely cause of this infection?
A. Staphylococcus aureus
B. Streptococcus pneumoniae
C. Escherichia coli
D. Pseudomonas aeruginosa
Question 15
In the context of evolutionary bio\logy, what is the primary mechanism driving the process of speciation?
A. Genetic drift
B. Mutation
C. Gene flow
D. Natural selection

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: