POST UTME BELLS UNIVERSITY 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A plant is placed in a controlled environment with a cons\tant temperature and humidity. What is the most likely effect on the plant's growth?
A. The plant will experience a decrease in growth rate
B. The plant will experience an increase in growth rate
C. The plant will experience no change in growth rate
D. The plant will experience a decrease in photosynthetic rate
Question 2
In the context of hormonal coordination, what is the primary function of the hypothalamic-pituitary-adrenal (HPA) axis?
A. Regulation of body temperature
B. Maintenance of blood pressure
C. Stimulation of the immune system
D. Regulation of the stress response
Question 3
A cell is placed in a solution containing a high concentration of glu\cose. What is the most likely outcome?
A. The cell will undergo mitosis
B. The cell will undergo meiosis
C. The cell will experience an increase in osmotic pressure
D. The cell will experience a decrease in osmotic pressure
Question 4
In the context of classification, what is the primary difference between a species and a genus?
A. A species is a group of organisms that can interbreed, while a genus is a group of related species
B. A species is a group of organisms that share a common ancestor, while a genus is a group of organisms that share a common characteristic
C. A species is a group of organisms that are adapted to a specific environment, while a genus is a group of organisms that are adapted to a specific diet
D. A species is a group of organisms that are able to reproduce, while a genus is a group of organisms that are able to evolve
Question 5
A cell is placed in a solution containing a high concentration of salt. What is the most likely outcome?
A. The cell will undergo mitosis
B. The cell will undergo meiosis
C. The cell will experience an increase in osmotic pressure
D. The cell will experience a decrease in osmotic pressure
Question 6
In a population of bacteria, the frequency of a particular gene is 0.6. If the population size is 1000, how many bacteria carry the gene?
A. 600
B. 400
C. 200
D. 100
Question 7
The process of mitosis results in the production of which type of cell?
A. Somatic cell
B. Germ cell
C. Tissue cell
D. Organ cell
Question 8
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 movement and balance
C. To process sensory information
D. To produce hormones
Question 9
Which of the following types of classification is based on the presence or absence of a nucleus in cells?
A. Binary classification
B. Ternary classification
C. Quaternary classification
D. Prokaryotic vs. Eukaryotic classification
Question 10
The process of mitosis results in the production of daughter cells that are genetically identical to the parent cell. Which of the following stages of mitosis is responsible for the separation of sister chromatids?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 11
In a tropical rainforest, the primary consumers are primarily herbivores that feed on the leaves and fruits of the plants. What is the most likely reason for this adaptation?
A. To avoid competition with other herbivores for food resources
B. To reduce the risk of predation by carnivores
C. To increase their chances of survival in a competitive environment
D. To exploit the abundant food resources in the rainforest
Question 12
In the context of gas exchange, what is the primary function of the alveolar-capillary membrane?
A. To regulate the pH of the blood
B. To facilitate the diffusion of oxygen into the blood
C. To remove carbon dioxide from the blood
D. To produce surfac\tant
Question 13
A diagram of a plant's transport system is shown below. Which of the following structures is responsible for the transport of water and minerals from the roots to the leaves?
A. Xylem sap
B. Phloem sap
C. Root hairs
D. Stomata
Question 14
In a tropical rainforest, the primary consumers are primarily composed of which of the following?
A. Herbivorous insects
B. Fruit-eating birds
C. Small mammals
D. Decomposers
Question 15
The diagram below represents a cross-section of a plant root. Which of the following structures is responsible for the absorption of water and minerals from the soil?
A. Xylem
B. Phloem
C. Cortex
D. Endodermis

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