POST UTME REDEEMERS UNIVERSITY 2020 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 what type of adaptation?
A. Mimicry
B. Camouflage
C. Specialized structure
D. Behavioral adaptation
Question 2
A species of bird has a beak length of 5 cm. If the beak length increases by 10% per generation, what will be the beak length of the bird's offspring?
A. 5.5 cm
B. 6 cm
C. 6.5 cm
D. 7 cm
Question 3
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. 0.72
D. 0.84
Question 4
A diagram of a simple harmonic motion is shown below. Identify the amplitude of the motion.
A. 2 cm
B. 4 cm
C. 6 cm
D. 8 cm
Question 5
A diagram of a human reproductive system is shown below. What is the primary function of the structure labeled 'C'?
A. To produce sperm
B. To produce eggs
C. To regulate hormone levels
D. To facilitate fertilization
Question 6
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'BB'?
A. 0.36
B. 0.64
C. 0.72
D. 0.84
Question 7
In the context of tissue classification, what is the primary characteristic that distinguishes epithelial tissue from connective tissue?
A. Cell polarity and adhesion
B. Presence of blood vessels
C. High water content
D. Ability to contract
Question 8
A plant exhibits the following characteristics: leaves are alternate, stipules are absent, and the stem is herbaceous. Which of the following is the most likely family?
A. Asteraceae
B. Fabaceae
C. Poaceae
D. Rosaceae
Question 9
A population of 1000 individuals has a mean height of 170 cm and a s\tandard deviation of 10 cm. If the population is normally distributed, what is the probability that a randomly selected individual will have a height greater than 190 cm?
A. 0.001
B. 0.01
C. 0.1
D. 0.5
Question 10
A patient with a malfunctioning adrenal gland is experiencing symptoms of hyperkalemia. Which of the following hormones is primarily responsible for regulating potassium levels in the blood?
A. Adrenaline
B. Aldosterone
C. Insulin
D. Glucagon
Question 11
The following equation represents the diffusion of a subs\tance across a membrane. What is the value of x in this equation?
A. 0
B. 1
C. 2
D. 3
Question 12
In the context of osmoregulation, what is the primary function of the kidneys in a desert-dwelling organism?
A. To conserve water by reabsorbing water from the filtrate
B. To excrete excess salt by producing a highly concentrated urine
C. To regulate electrolyte balance by adjusting the amount of ions in the urine
D. To maintain acid-base balance by adjusting the pH of the urine
Question 13
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 14
A diagram of a plant cell is shown below. What is the primary function of the structure labeled 'B'?
A. To regulate water content
B. To provide structural support
C. To facilitate gas exchange
D. To synthesize proteins
Question 15
A cell has a membrane potential of -70 mV. If the cell is stimulated with a 1 ms pulse of 10 mV, calculate the cell's membrane potential after the pulse.
A. -80 mV
B. -70 mV
C. -60 mV
D. -50 mV

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