POST UTME UI 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of eco\logical succession in a newly formed volcanic island is an example of
A. primary succession
B. secondary succession
C. climax community
D. eco\logical balance
Question 2
The diagram below shows the structure of a human brain. Which of the following is the correct function of the cerebral cortex?
A. Regulating the heartbeat
B. Regulating the blood pressure
C. Regulating the blood flow
D. Proces\sing sensory information
Question 3
The sense organ responsible for detecting changes in sound pressure is the
A. cochlea
B. stapes
C. tympanic membrane
D. auditory nerve
Question 4
A diagram of the human heart is shown below. What is the primary function of the atrioventricular (AV) node?
A. To regulate heart rate
B. To conduct electrical impulses from the atria to the ventricles
C. To pump blood from the heart to the lungs
D. To regulate blood pressure
Question 5
A diagram of the human kidney is shown below. What is the primary function of the renal pelvis?
A. To filter waste products from the blood
B. To regulate blood pressure
C. To concentrate urine
D. To collect and transport urine to the bladder
Question 6
A cell in interphase has a DNA content of 2C. If the cell undergoes mitosis, what will be the DNA content of the daughter cells?
A. 2C
B. 4C
C. 6C
D. 8C
Question 7
A 0.5 M solution of NaOH is mixed with a 0.5 M solution of HCl. What is the pH of the resulting solution?
A. 1
B. 7
C. 10
D. 14
Question 8
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 9
A plant is placed in a solution with a high concentration of sucrose. Which of the following is a likely effect on the plant's growth?
A. Increased growth rate due to increased water potential
B. Decreased growth rate due to decreased water potential
C. No effect on growth rate
D. Increased growth rate due to increased turgor pressure
Question 10
In a population of 1000 individuals, 20% are heterozygous for a particular gene and 30% are homozygous recessive. What is the frequency of the dominant allele?
A. 0.2
B. 0.3
C. 0.4
D. 0.5
Question 11
A 2.5 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.25 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, what is the maximum speed of the block?
A. 0.25\sqrt{10}
B. 0.5\sqrt{10}
C. 0.75\sqrt{10}
D. 1.0\sqrt{10}
Question 12
A person with a blood type of AB+ has a child with a person with a blood type of A-. What is the blood type of the child?
A. A-
B. A+
C. AB-
D. O-
Question 13
In a desert e\cosystem, the primary producers are mainly cacti and succulents. What is the role of these plants in the e\cosystem?
A. Decomposers
B. Primary consumers
C. Secondary consumers
D. Producers
Question 14
A population of bacteria is growing according to the \logistic growth equation. If the initial population size is 100, the carrying capacity is 1000, and the growth rate is 0.5, what is the population size after 5 generations?
A. 400
B. 600
C. 800
D. 1000
Question 15
A 5 kg block is moving at a speed of 2 m/s on a frictionless surface. If the block is subjected to a cons\tant force of 10 N, what is the acceleration of the block?
A. 1
B. 2
C. 3
D. 4

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: