POST UTME NILE UNIVERSITY 2025 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a human circulatory system is shown below. What is the function of the part labeled 'E'?
A. to pump blood throughout the body
B. to regulate blood pressure
C. to produce red blood cells
D. to filter waste products
Question 2
The xylem tissue in plants is responsible for transporting water and minerals from the roots to the leaves. Which of the following is a characteristic of xylem tissue?
A. It is a type of parenchyma tissue
B. It is responsible for transporting water and minerals
C. It is composed of tracheids and vessels
D. It is found only in dicot plants
Question 3
The xylem tissue in plants is responsible for transporting water and minerals from the roots to the leaves. Which of the following is a characteristic of xylem tissue?
A. It is composed of dead cells
B. It is composed of living cells
C. It transports sugars and amino acids
D. It transports water and minerals
Question 4
A diagram of the human circulatory system is shown below. What is the function of the part labeled B?
A. To pump blood to the lungs
B. To carry oxygenated blood to the body
C. To regulate blood pressure
D. To produce red blood cells
Question 5
A forest e\cosystem is characterized by a mix of deciduous and evergreen trees. What is the primary function of the evergreen trees in this e\cosystem?
A. Food source for herbivores
B. Shelter for wildlife
C. Soil stabilization
D. Carbon sequestration
Question 6
In the context of evolutionary theory, what is the primary mechanism by which species adapt to changing environments?
A. Natural Selection
B. Genetic Drift
C. Gene Flow
D. Mutation
Question 7
A patient is diagnosed with a bacterial infection. The bacteria are gram-positive and have a cell wall composed of peptidoglycan. What is the primary mechanism by which the bacteria maintain their cell shape?
A. Peptidoglycan cross-linking
B. Cell membrane fluidity
C. Protein synthesis
D. DNA replication
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. Natural selection
Question 9
A diagram of a human cell is shown below. What is the function of the part labeled 'B'?
A. to synthesize proteins
B. to store genetic information
C. to regulate cell growth
D. to transport molecules
Question 10
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 11
The nervous system of an organism is responsible for transmitting signals from sensory receptors to the brain. Which of the following is a type of sensory receptor?
A. Photoreceptor
B. Mechanoreceptor
C. Thermoreceptor
D. Electroreceptor
Question 12
The xylem tissue in plants is responsible for?
A. Transporting water and minerals from the roots to the leaves
B. Transporting sugars and other organic compounds from the leaves to the rest of the plant
C. Supporting the plant's structure
D. Storing food and water
Question 13
A researcher is studying the population dynamics of a species of rabbit. The population growth rate is modeled by the \logistic equation \( \frac{dP}{dt} = rPleft\( 1 - \frac{P}{K}\right \ \) ). What is the carrying capacity of the population?
A. 10
B. 20
C. 30
D. 40
Question 14
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. Association neurons
Question 15
The sense organ responsible for detecting changes in sound pressure is the?
A. Cochlea
B. Vestibule
C. Eustachian tube
D. Middle ear bones

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