POST UTME BABCOCK UNIVERSITY 2018 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
Which of the following is an example of a symbiotic relationship in the classification of living things?
A. Predator-prey relationship between a lion and a zebra
B. Mutualism between bees and flowers
C. Competition between two species for resources
D. Commensalism between a remora fish and a shark
Question 2
In the context of evolutionary theory, what is the primary mechanism by which genetic drift acts on a population?
A. Mutation
B. Gene flow
C. Genetic drift
D. Natural selection
Question 3
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. What is the expected frequency of the homozygous recessive genotype 'bb'?
A. 0.04
B. 0.08
C. 0.12
D. 0.16
Question 4
In the nervous system, what is the primary function of the synapse?
A. To transmit nerve impulses from one neuron to another
B. To store nerve impulses for later use
C. To provide structural support to the neuron
D. To produce hormones that regulate body functions
Question 5
A diagram of the xylem tissue is shown below. Identify the part labeled 'B'?
A. Tracheid
B. Xylem vessel
C. Phloem fiber
D. Pith
Question 6
In a desert e\cosystem, what is the primary mechanism by which plants conserve water?
A. CAM photosynthesis
B. C4 photosynthesis
C. Crassulacean acid metabolism
D. Stomatal closure
Question 7
The nervous system's ability to coordinate voluntary movements is primarily due to the integration of information from sensory receptors and motor neurons. Which of the following best describes the type of synapse involved in this process?
A. Chemical synapse
B. Electrical synapse
C. Mechanoreceptor
D. Motor neuron
Question 8
In the xylem transport system, what is the primary function of the xylem parenchyma cells?
A. To transport water and minerals from the roots to the leaves
B. To store food and water for the plant
C. To provide structural support to the plant
D. To produce hormones that regulate plant growth
Question 9
The classification of living organisms into kingdoms is based on the following characteristics. Which of the following is NOT a characteristic used in the classification of living organisms?
A. Cell wall presence
B. Cell membrane presence
C. Mitochondria presence
D. Photosynthesis
Question 10
In a photosynthetic pathway, which of the following enzymes catalyzes the conversion of ribulose-1,5-bisphosphate to 3-phosphoglycerate?
A. Ribulose-1,5-bisphosphate carboxylase/oxygenase
B. Phosphoglycerate kinase
C. Phosphoglycerate mutase
D. Triosephosphate isomerase
Question 11
What is the primary function of the xylem in plants?
A. Transport of sugars and other organic compounds.
B. Transport of water and minerals from the roots to the leaves.
C. Storage of food and water.
D. Support and structural functions.
Question 12
In the human digestive system, what is the primary function of the pancreas?
A. Production of bile.
B. Production of digestive enzymes.
C. Absorption of nutrients.
D. Storage of food and water.
Question 13
The human body's ability to maintain homeostasis is primarily due to the regulation of body temperature. Which of the following organs plays a crucial role in this process?
A. Kidneys
B. Liver
C. Pancreas
D. Hypothalamus
Question 14
In the process of growth and regulation, what is the primary function of the auxin hormone?
A. To promote cell elongation and cell division
B. To inhibit cell growth and cell division
C. To regulate stomatal opening and clo\sing
D. To produce flowers and fruits
Question 15
In the context of eco\logical succession, what is the primary mechanism by which a community changes over time?
A. Competition
B. Predation
C. Mutualism
D. Succession

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