POST UTME ABU 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A plant cell is shown below. What is the function of the part labeled 'B'?
A. To store water and nutrients
B. To provide structural support
C. To regulate gas exchange
D. To produce hormones
Question 2
A population of rabbits is introduced to a new island. Initially, the population grows exponentially, but eventually, it reaches a carrying capacity. What is the primary factor limiting the population growth?
A. Predation by native predators
B. Competition for resources such as food and water
C. Disease transmission among the rabbit population
D. Genetic drift due to random events
Question 3
In the context of osmoregulation, what is the primary function of the kidneys in a desert-dwelling organism?
A. To conserve water by reabsorbing glu\cose and amino acids
B. To excrete excess salt and water through the process of diuresis
C. To regulate electrolyte balance by reabsorbing sodium and potassium
D. To produce antidiuretic hormone (ADH) to increase water reabsorption
Question 4
The process by which the body's cells obtain the nutrients they need is known as?
A. Digestion
B. Absorption
C. Assimilation
D. Excretion
Question 5
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. 0.16
B. 0.32
C. 0.64
D. 0.8
Question 6
In a tropical rainforest e\cosystem, the presence of a large population of herbivores can lead to a decrease in the population of a particular species of tree. This is an example of a(n)
A. bottom-up trophic cascade
B. top-down trophic cascade
C. mutualism
D. competition
Question 7
A forest e\cosystem is composed of a variety of plant and animal species. What is the term for the process by which energy is transferred from one trophic level to the next?
A. Decomposition
B. Nutrient cycling
C. Primary production
D. Energy transfer
Question 8
A diagram of a plant cell is shown below. Identify the structure labeled 'A'.
A. Cell wall
B. Vacuole
C. Chloroplast
D. Mitochondria
Question 9
A diagram of a plant cell is shown below. Which of the following organelles is responsible for protein synthesis?
A. Nucleus
B. Mitochondria
C. Ribosomes
D. Cell wall
Question 10
The type of microorganism that causes the disease tuberculosis is known as?
A. Bacteria
B. Virus
C. Fungus
D. Parasite
Question 11
The study of the structure, behavior, and evolution of the universe is called
A. \cosmo\logy
B. astrophysics
C. geo\logy
D. meteoro\logy
Question 12
A cell is placed in a solution with a high concentration of glu\cose. What will happen to the cell's membrane potential?
A. It will become more negative
B. It will become more positive
C. It will remain the same
D. It will become zero
Question 13
A diagram of a plant's xylem and phloem tissues is shown below. What is the function of the xylem tissue?
A. Transporting water and minerals
B. Transporting sugars and amino acids
C. Storing starch and proteins
D. Regulating temperature
Question 14
The cell membrane is selectively permeable due to the presence of
A. phospholipid bilayer
B. protein channels
C. glycoproteins
D. all of the above
Question 15
The process by which plants convert light energy into chemical energy is known as?
A. Respiration
B. Photosynthesis
C. Transpiration
D. Evaporation

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