POST UTME GREENFIELD UNIVERSITY 2022 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. The plant's growth is measured over time. Which of the following best describes the type of growth depicted in the graph?
A. Exponential growth
B. Logarithmic growth
C. Linear growth
D. Sigmoid growth
Question 2
In a population of rabbits, what is the term for the process by which the frequency of a particular trait increases over time?
A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation
Question 3
A patient is diagnosed with a viral infection. The virus is highly contagious and spreads quickly through the population. Which of the following is the most likely cause of this spread?
A. Horizontal gene transfer
B. Vertical gene transfer
C. Mutation
D. Genetic recombination
Question 4
Which of the following is an example of a sexual reproduction in animals?
A. Fission in starfish
B. Budding in hydra
C. Spawning in fish
D. Mating in birds
Question 5
In the process of reproduction, which of the following is a characteristic of asexual reproduction?
A. Production of gametes
B. Fusion of gametes
C. No genetic variation
D. No offspring
Question 6
In a desert e\cosystem, what is the primary role of the xerophyte plant?
A. To produce shade
B. To provide food for herbivores
C. To conserve water
D. To regulate soil temperature
Question 7
A population of rabbits is introduced to a new island, and over time, they adapt to the new environment. Which of the following evolutionary mechanisms is responsible for this adaptation?
A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation
Question 8
A diagram of a human kidney is shown below. Identify the component labeled 'Y'.
A. Renal Papilla
B. Renal Cortex
C. Renal Medulla
D. Ureter
Question 9
A 2.5 L flask contains 0.5 M NaCl solution. If 10 mL of 2 M HCl is added to the solution, what is the new concentration of NaCl?
A. 0.4 M
B. 0.5 M
C. 0.6 M
D. 0.7 M
Question 10
A bio\logist is studying the population dynamics of a species of deer in a forest e\cosystem. Which of the following factors would most likely affect the population growth rate?
A. Availability of food resources
B. Predation by other animals
C. Disease outbreaks
D. Climate change
Question 11
The growth and development of an organism is influenced by various factors, including genetics and environment. Which of the following is an example of a genetic factor that influences growth?
A. Hormonal regulation
B. Nutritional intake
C. Genetic mutations
D. Environmental toxins
Question 12
In the process of osmoregulation, what is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
A. Reabsorption of ions in the proximal convoluted tubule
B. Secretion of ions in the distal convoluted tubule
C. Regulation of ion channels in the collecting duct
D. Excretion of ions in the urine
Question 13
A diagram of a human heart is shown below. Identify the component labeled 'Z'.
A. Atrium
B. Ventricle
C. Aorta
D. Pulmonary Vein
Question 14
In a population of 1000 individuals, 70% are heterozygous for the ABO blood group gene. If 50 individuals are randomly selected, what is the probability that at least 30 of them will be heterozygous?
A. 0.05
B. 0.15
C. 0.25
D. 0.35
Question 15
A patient is diagnosed with a bacterial infection. The bacteria are resis\tant to multiple antibiotics. Which of the following is the most likely cause of this resis\tance?
A. Horizontal gene transfer
B. Vertical gene transfer
C. Mutation
D. Genetic recombination

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