WAEC 2022 Biology | Essay

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Question 1 View Details
Question Parts
(a(i))
What is a cell?
(a(ii))
Name three scientists that are associated with the discovery of the cell.
(b(i))
Make a diagram, \( 6 c m \) to \( 8 c m \) long of a plant cell and label only the organelle responsible for cell reproduction.
(b(ii))
Name one blood cell in humans that does not have the organelle in 1b(i).
(b(iii))
What is the biological implication of the cell named 1b(ii) not possessing the organelle responsible for cell reproduction?
(c)
List six organelles found in a plant cell.
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Question 2 View Details
Question Parts
(a)
Complete the table by ticking \( (\sqrt{ }) \) the appropriate group to which each of the listed elements required by plants belongs.\(\begin{array}{|l|l|l|} \hline \text{Element} & \text{Group} \\ & \text{microelement} & \text{Macroelement} \\ \hline \text{Hydrogen} & & \\ \hline \text{Copper} & & \\ \hline \text{Magnesium} & & \\ \hline \text{Zinc} & & \\ \hline \text{Phosphorus} & & \\ \hline \text{Manganese} & & \\ \hline \text{Boron} & & \\ \hline \text{Nitrogen} & & \\ \hline \text{Carbon} & & \\ \hline \text{Oxygen} & & \\ \hline \end{array}\)
(b(i))
State three differences between the dentition of a herbivore and a carnivore.
(b(ii))
State four differences between the dentition of a human and a goat.
(c)
What are milk teeth?
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Question 3 View Details
Question Parts
(a(i))
What is an ecological niche?
(a(ii))
State five roles played by a mango tree in its ecological niche.
(b(i))
State two reasons why ecologists use sampling techniques in population studies.
(b(ii))
State four examples of sampling techniques used in population studies.
(c)
Name four types of fingerprints in humans.
(d(i))
Name the plant used by Gregor Mendel in his experiment.
(d(ii))
State two reasons why the plant named in 3d(i) was used.
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Question 4 View Details
Question Parts
(a(i))
What are conservation laws?
(a(ii))
State three conservation laws.
(b(i))
State two reasons why animals are poached.
(b(ii))
Name five animals that are commonly poached.
(c)
State four effects of excessive use of the forest.
(d)
Explain briefly the following terms: (i) blood transfusion.
(ii)
antigen.
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Question 5 View Details
Question Parts
(a(i))
State three differences between the alimentary canals of earthworm and cockroach.
(a(ii))
State three similarities between the alimentary canals of earthworm and cockroach.
(b(i))
The diagram above is an illustration of a biological cycle. Study it and answer questions 5b(i) to 5b(iii). Name the biological cycle.
(b(ii))
Explain briefly three roles played by plants and animals in the cycle.
(b(iii))
Name the processes that occur in \( \mathbf{X}, \mathbf{Y} \) and Z.
(c)
Complete the table below; \(\begin{array}{|l|l|l|} \hline & \text{Organ associated with excretion in humans} & \text{Three diseases each that affect the organ} \\ \hline (i) & & \\ \hline (ii) & & \\ \hline \end{array}\)
(d(i))
What is decay of organic matter?
(d(ii))
Name two groups of organisms that cause decay of organic matter.
(d(iii))
State one other factor that causes decay.
(d(iv))
Name the biological cycle that involves decay.
(e)
Explain briefly the mode of nutrition in carnivorous plants.
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