POST UTME UNILAG 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the context of evolutionary theory, what is the primary mechanism by which genetic drift can lead to the fixation of a deleterious mutation?
A. Genetic hitchhiking
B. Bottleneck effect
C. Founder effect
D. Genetic drift
Question 2
A diagram of the human circulatory system is shown below. Which of the following structures is responsible for the regulation of blood pressure?
A. Aorta
B. Pulmonary artery
C. Carotid artery
D. Renal artery
Question 3
A species of plant has a unique life cycle that involves the production of spores. Which of the following reproductive strategies is most likely being employed by this species?
A. Asexual reproduction
B. Sexual reproduction
C. Parthenogenesis
D. Apomixis
Question 4
In the context of blood transport systems, what is the primary function of the erythrocytes?
A. To regulate blood pH
B. To transport oxygen and carbon dioxide
C. To maintain blood pressure
D. To filter waste products
Question 5
A species of bird has a unique mating ritual where the male performs a complex dance to attract a female. Which of the following reproductive strategies is most likely being employed by this species?
A. Asexual reproduction
B. Sexual reproduction
C. Parthenogenesis
D. Apomixis
Question 6
A population of bacteria has a growth rate of 0.05 and a carrying capacity of 1000. What is the population size at equilibrium?
A. 500
B. 750
C. 1000
D. 1250
Question 7
A diagram of the human respiratory system is shown below. What is the function of the part labeled 'B'?
A. To exchange oxygen and carbon dioxide
B. To regulate breathing rate
C. To produce mucus
D. To detect odors
Question 8
A diagram of a plant cell is shown. Identify the organelle responsible for protein synthesis.
A. Mitochondria
B. Ribosome
C. Endoplasmic reticulum
D. Lysosome
Question 9
The nervous system is responsible for
A. regulating body temperature
B. controlling blood pressure
C. transmitting nerve impulses
D. producing hormones
Question 10
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 11
In a tropical rainforest, the primary consumers are primarily herbivores. Which of the following is a characteristic of the primary consumers in this e\cosystem?
A. They have a high metabolic rate
B. They are primarily carnivores
C. They have a low reproductive rate
D. They are primarily detritivores
Question 12
The human body is composed of
A. 5 main organs
B. 11 main systems
C. 4 main tissues
D. all of the above
Question 13
What is the process by which microorganisms break down organic matter in the absence of oxygen?
A. Fermentation
B. Putrefaction
C. Decomposition
D. Saprotrophy
Question 14
A cell is placed in a hypertonic solution. What happens to the cell?
A. The cell shrinks
B. The cell swells
C. The cell remains unchanged
D. The cell bursts
Question 15
A population of rabbits is growing exponentially. If the initial population is 100 and the growth rate is 20% per year, what is the population after 5 years?
A. 1000
B. 2000
C. 4000
D. 8000

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