POST UTME GREENFIELD UNIVERSITY 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The nervous system is responsible for transmitting signals throughout the body. What is the primary mechanism by which neurons communicate with each other?
A. Direct electrical conduction
B. Chemical synapses
C. Gap junctions
D. Electrical synapses
Question 2
A diagram of the human eye is shown below. What is the function of the structure labeled 'A'?
A. To focus light on the retina
B. To regulate the amount of light entering the eye
C. To detect color
D. To detect movement
Question 3
The diagram below shows the structure of a neuron. Which part of the neuron is responsible for transmitting signals to other neurons?
A. D\endrite
B. Axon
C. Cell body
D. Myelin sheath
Question 4
The xylem tissue in plants is responsible for transporting water and minerals from the roots to the leaves. What is the primary mechanism by which xylem tissue achieves this function?
A. Transpiration pull
B. Root pressure
C. Capillary action
D. Osmosis
Question 5
A plant cell has a cell wall composed of cellulose. Which of the following is a characteristic of cellulose?
A. It is a polysaccharide
B. It is a protein
C. It is a polysaccharide composed of glu\cose units
D. It is a polysaccharide composed of fructose units
Question 6
A 5.0 L flask contains 2.0 mol of an ideal gas at 25°C. If the gas is compressed to half the volume, what is the new pressure?
A. 1.0 atm
B. 2.0 atm
C. 3.0 atm
D. 4.0 atm
Question 7
A diagram of the human circulatory system is shown below. What is the primary function of the heart?
A. Pumping of blood throughout the body
B. Regulation of blood pressure
C. Filtering of blood
D. Production of blood cells
Question 8
The structure that contains the genetic material of an organism is the _______.
A. Nucleus
B. Mitochondria
C. Chloroplast
D. Ribosome
Question 9
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'Rr'?
A. 0.5
B. 0.25
C. 0.75
D. 0.33
Question 10
In the classification of living things, what is the rank that comes after kingdom and before phylum?
A. Domain
B. Kingdom
C. Phylum
D. Class
Question 11
The process of symbiotic relationship between fungi and plant roots is known as
A. Mycorrhizal association
B. Lichenization
C. Epiparasitism
D. Commensalism
Question 12
The diagram below shows the water cycle. Which process is responsible for the formation of clouds?
A. Evaporation
B. Condensation
C. Precipitation
D. Runoff
Question 13
The process by which cells divide to produce two daughter cells is known as _______.
A. Mitosis
B. Meiosis
C. Binary Fission
D. Endosymbiosis
Question 14
In a plant cell, what is the primary function of the mitochondria?
A. Protein synthesis
B. Cell signaling
C. Energy production through cellular respiration
D. DNA replication
Question 15
What is the term for the process by which an organism's genetic information is passed from one generation to the next?
A. Mutation
B. Genetic drift
C. Natural selection
D. Heritability

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