POST UTME BOWEN UNIVERSITY 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
What is the primary function of the excretory system in humans?
A. Regulation of body temperature
B. Removal of waste products
C. Production of hormones
D. Maintenance of blood pressure
Question 2
The process by which an organism's body temperature is regulated is called
A. Homeostasis
B. Thermoregulation
C. Osmoregulation
D. Excretion
Question 3
A diagram of the human eye is shown below. Identify the part labeled 'A'.
A. Cornea
B. Iris
C. Retina
D. Lens
Question 4
In a desert e\cosystem, what is the primary mechanism of water conservation in plants?
A. CAM photosynthesis
B. C4 photosynthesis
C. Waxy coatings on leaves
D. Deep roots
Question 5
In a study on the effect of pH on enzyme activity, the following data were collected:\n\npH 0 1 2 3 4 5 6 7 8 9 10\n\nActivity 0 10 20 30 40 50 60 70 80 90 100
A. pH 7
B. pH 4
C. pH 9
D. pH 1
Question 6
In the context of osmoregulation, what is the primary function of the kidneys in a desert-dwelling organism?
A. To conserve water by producing highly concentrated urine
B. To excrete excess salt and water
C. To regulate blood pressure
D. To maintain acid-base balance
Question 7
A 2.0 L flask contains 0.50 M NaCl. What is the concentration of Cl- ions in the solution?
A. 0.25 M
B. 0.50 M
C. 0.75 M
D. 1.0 M
Question 8
The type of adaptation that occurs in response to changes in the environment is called
A. Acclimation
B. Acclimatization
C. Evolution
D. Natural Selection
Question 9
The theory of evolution by natural selection, proposed by Charles Darwin, suggests that species evolve over time through the process of
A. mutation and genetic drift
B. gene flow and genetic recombination
C. natural selection and genetic variation
D. artificial selection and genetic engineering
Question 10
In a coral reef e\cosystem, what is the primary source of energy for the food web?
A. Phytoplankton
B. Zooplankton
C. Detritus
D. Fish
Question 11
In a eukaryotic cell, the process of cell division that results in the production of four daughter cells, each with the same number of chromosomes as the parent cell, is called
A. Mitosis
B. Meiosis
C. Binary Fission
D. Endosymbiosis
Question 12
In a tropical rainforest, the presence of a diverse array of plant species is primarily due to the
A. high levels of rainfall
B. presence of a large number of herbivores
C. abundance of nutrient-rich soil
D. complex network of underground fungal hyphae
Question 13
A researcher is studying the effects of exercise on the respiratory system. The researcher collects blood samples from a group of athletes before and after exercise and measures the partial pressure of oxygen in the blood. Which of the following is a consequence of exercise on the respiratory system?
A. Increased ventilation rate
B. Decreased diffusion rate
C. Increased partial pressure of oxygen
D. Decreased respiratory rate
Question 14
The xylem in plants is responsible for transporting water and minerals from the roots to the leaves, and is composed of
A. tracheids and vessels
B. xylem parenchyma and xylem fibers
C. phloem and xylem
D. cambium and phloem
Question 15
The process of photosynthesis in plants involves the conversion of light energy into chemical energy, which is stored in the form of
A. ATP and NADPH
B. glu\cose and oxygen
C. starch and water
D. sucrose and ethanol

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