POST UTME BABCOCK UNIVERSITY 2018 Biology | Objective

Are you preparing for POST UTME BABCOCK UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2018 Biology (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
In the xylem transport system, what is the primary function of the xylem parenchyma cells?
Correct 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

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 2
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
Correct B. Mutualism between bees and flowers
C. Competition between two species for resources
D. Commensalism between a remora fish and a shark

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 3
In the nervous system, what is the primary function of the synapse?
Correct 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

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 4
In the process of growth and regulation, what is the primary function of the auxin hormone?
Correct 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

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 5
In the classification of living things, what is the primary characteristic that distinguishes between prokaryotic and eukaryotic cells?
Correct A. The presence of a true nucleus
B. The absence of a true nucleus
C. The presence of mitochondria
D. The absence of chloroplasts

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 6
In a population of Drosophila melanogaster, the frequency of the recessive allele 'r' is 0.2. If the population size is 1000, what is the expected number of homozygous recessive individuals?
Correct A. 180
B. 200
C. 220
D. 240

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 7
A plant with the genotype AaBbCcc is crossed with a plant with the genotype AaBbDdd. What is the probability that the offspring will have the genotype AaBbCc?
A. 1/4
Correct B. 1/2
C. 3/4
D. 1

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 8
A solution of 0.1 M NaCl is prepared by dissolving 5.84 g of NaCl in 1000 mL of water. What is the concentration of the solution in molarity?
A. 0.05 M
Correct B. 0.1 M
C. 0.15 M
D. 0.2 M

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 9
A 2.5 L flask contains 0.5 g of O2 at 25°C and 1 atm. What is the partial pressure of O2?
A. 0.5 atm
B. 0.75 atm
Correct C. 1 atm
D. 1.25 atm

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 10
A 10% solution of glu\cose is prepared by dissolving 10 g of glu\cose in 90 g of water. What is the concentration of the solution in molarity?
A. 0.1 M
Correct B. 0.5 M
C. 1 M
D. 5 M

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 11
In a desert e\cosystem, what is the primary mechanism by which plants conserve water?
A. CAM photosynthesis
B. C4 photosynthesis
Correct C. Crassulacean acid metabolism
D. Stomatal closure

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 12
A cell is placed in a hypertonic solution. What will happen to the cell?
Correct A. The cell will swell and eventually burst.
B. The cell will shrink and eventually die.
C. The cell will remain unchanged.
D. The cell will grow and divide.

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 13
What is the process by which plants convert light energy into chemical energy?
A. Respiration
Correct B. Photosynthesis
C. Decomposition
D. Fermentation

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 14
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
Correct A. Nucleus
B. Mitochondria
C. Chloroplast
D. Vacuole

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 15
What is the term for the movement of water from the roots to the leaves of a plant?
Correct A. Transpiration
B. Translocation
C. Osmosis
D. Diffusion

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 16
In the context of evolutionary theory, what is the primary mechanism by which genetic drift acts on a population?
A. Mutation
B. Gene flow
Correct C. Genetic drift
D. Natural selection

Correct Answer: C

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 17
A diagram of the human eye is shown below. Identify the part labeled 'A'?
Correct A. Cornea
B. Iris
C. Retina
D. Lens

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 18
In asexual reproduction, what is the primary mechanism by which genetic variation is introduced into a population?
A. Mutation
B. Gene flow
C. Genetic drift
Correct D. Genetic recombination

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 19
A diagram of the xylem tissue is shown below. Identify the part labeled 'B'?
A. Tracheid
Correct B. Xylem vessel
C. Phloem fiber
D. Pith

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 20
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
Correct D. Succession

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 21
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
Correct B. Electrical synapse
C. Mechanoreceptor
D. Motor neuron

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 22
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
Correct D. Photosynthesis

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 23
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
Correct D. Hypothalamus

Correct Answer: D

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 24
The process of evolution is driven by the accumulation of genetic mutations over time. Which of the following best describes the type of mutation that results in a change in the DNA sequence?
Correct A. Point mutation
B. Frameshift mutation
C. Deletion
D. Insertion

Correct Answer: A

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics
Question 25
The human body's ability to respond to stress is primarily due to the activation of the hypothalamic-pituitary-adrenal (HPA) axis. Which of the following hormones plays a crucial role in this process?
A. Adrenaline
Correct B. Cortisol
C. Insulin
D. Growth hormone

Correct Answer: B

Want to see the full step-by-step solution? Unlock AI Explanation & Analytics

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:
Chat with Support