POST UTME MOUNTAIN TOP UNIVERSITY 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of the human brain is shown below. Identify the part labeled 'A'.
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Frontal Lobe
Question 2
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. 0.64
B. 0.36
C. 0.16
D. 0.84
Question 3
The evolutionary theory of natural selection proposes that
A. organisms with favorable traits will survive and reproduce
B. organisms with unfavorable traits will die off and be replaced
C. organisms will adapt to their environment through genetic drift
D. organisms will evolve through mutation and genetic recombination
Question 4
A diagram of the human heart is shown below. Identify the part labeled 'B'.
A. Left Ventricle
B. Right Ventricle
C. Left Atrium
D. Right Atrium
Question 5
In the xylem, the primary function of the tracheids is to transport water and minerals from the roots to the leaves. What is the characteristic feature of tracheids that allows them to perform this function?
A. Thick cell walls
B. Lack of pits
C. Presence of pits
D. Perforated walls
Question 6
A solution of 0.1 M NaCl is prepared by dissolving 5.84 g of NaCl in 1 L of water. What is the concentration of the solution in mol/L?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 7
The xylem transport system in plants is responsible for the movement of
A. water and minerals from roots to leaves
B. sugars and amino acids from leaves to roots
C. hormones and growth regulators from roots to shoots
D. wastes and excess ions from leaves to roots
Question 8
A diagram of the human eye is shown below. Identify the part labeled 'C'.
A. Cornea
B. Iris
C. Retina
D. Lens
Question 9
The process of mitosis in eukaryotic cells involves the replication of DNA and the separation of chromosomes into two daughter cells. What is the primary function of the centrioles in this process?
A. To form the spindle fibers
B. To replicate the DNA
C. To separate the chromosomes
D. To form the nuclear envelope
Question 10
In the e\cosystem of a tropical rainforest, the primary producers are the plants and algae that undergo photosynthesis to produce organic compounds. What is the role of the decomposers in this e\cosystem?
A. Primary consumers
B. Decomposers
C. Secondary consumers
D. Tertiary consumers
Question 11
The sense organ responsible for detecting changes in sound waves is the
A. eye
B. ear
C. nose
D. tongue
Question 12
The theory of evolution by natural selection proposes that populations of organisms adapt to their environments through the process of variation, mutation, genetic drift, and gene flow. Which of the following is an example of genetic drift?
A. Mutation
B. Gene flow
C. Genetic drift
D. Natural selection
Question 13
The nervous system's coordination of muscle contraction and relaxation is primarily achieved through the
A. release of neurotransmitters
B. depolarization of muscle fibers
C. action potentials in motor neurons
D. synaptic transmission at neuromuscular junctions
Question 14
The process of chemosynthesis in certain microorganisms involves the conversion of carbon dioxide and water into organic compounds u\sing energy derived from the oxidation of inorganic subs\tances. Which of the following microorganisms is an example of a chemosynthetic organism?
A. Bacteria
B. Archaea
C. Fungi
D. Protists
Question 15
The process of osmoregulation in animals involves the regulation of
A. water and electrolyte balance
B. ion concentration in cells
C. blood pressure and blood volume
D. body temperature and pH levels

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