POST UTME PAN-ATLANTIC UNIVERSITY 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A species of bird has a beak shape that is well-suited for cracking open nuts. This is an example of which type of evolutionary adaptation?
A. Convergent evolution
B. Divergent evolution
C. Adaptation
D. Speciation
Question 2
A 30-year-old woman presents to her gyneco\logist with a history of infertility. Her husband has a normal semen analysis. Which of the following is the most likely cause of her infertility?
A. Tubal ligation
B. Endometriosis
C. Polycystic ovary syndrome
D. Premature ovarian failure
Question 3
A cell is placed in a medium with a high concentration of glu\cose. Which of the following is the primary response of the cell?
A. Increase in cell size
B. Increase in cell division
C. Increase in cell death
D. No change
Question 4
In the context of hormonal coordination, what is the primary function of the hypothalamic-pituitary-adrenal (HPA) axis?
A. Regulation of body temperature
B. Stimulation of the immune system
C. Modulation of the stress response
D. Control of appetite and satiety
Question 5
The diagram below shows the structure of a plant root. Which part of the root is responsible for absorbing water and minerals from the soil?
A. Root Hair
B. Root Cap
C. Root Cortex
D. Root Stele
Question 6
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 glu\cose levels
C. Stress response and adaptation
D. Regulation of appetite and satiety
Question 7
In the context of nutrition, what is the primary function of chlorophyll in photosynthesis?
A. To absorb light energy from the sun
B. To convert light energy into chemical energy
C. To transport water and minerals to the plant
D. To regulate the temperature of the plant
Question 8
In the context of respiration and gas exchange, what is the primary function of the alveoli in the lungs?
A. To exchange oxygen and carbon dioxide with the environment
B. To regulate the pH of the blood
C. To remove waste products from the blood
D. To regulate the concentration of ions in the blood
Question 9
The process of diffusion is an example of a type of transport that occurs in living organisms. What is the name of the type of transport that involves the movement of molecules from an area of high concentration to an area of low concentration?
A. Active Transport
B. Passive Transport
C. Osmosis
D. Endocytosis
Question 10
A cell is in the process of undergoing mitosis. Which of the following stages is characterized by the condensation of chromatin into visible chromosomes?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 11
The process of meiosis is a type of cell division that results in the production of gametes. What is the name of the stage where the chromosomes line up in the center of the cell?
A. Prophase I
B. Metaphase I
C. Anaphase I
D. Telophase I
Question 12
A plant's xylem is responsible for transporting water and minerals from the roots to the leaves. Which of the following structures is most likely to be involved in this process?
A. Tracheids
B. Vessel elements
C. Xylem parenchyma
D. Phloem sieve cells
Question 13
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. 0.8
D. 0.16
Question 14
The diagram below shows the structure of a nerve cell. Which part of the cell is responsible for transmitting signals to other cells?
A. D\endrite
B. Axon
C. Cell Body
D. Myelin Sheath
Question 15
A patient with chronic obstructive pulmonary disease (COPD) has difficulty exhaling due to airway obstruction. Which of the following respiratory muscles is primarily responsible for expiration?
A. Diaphragm
B. External inter\costal muscles
C. Internal inter\costal muscles
D. Abdominal muscles

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