2.1 The diagram below shows the alimentary canal of a farm animal - NSC Agricultural Sciences - Question 2 - 2023 - Paper 1
Question 2
2.1 The diagram below shows the alimentary canal of a farm animal.
Name the farm animal represented by the alimentary canal in the diagram above.
Give TWO reasons,... show full transcript
Worked Solution & Example Answer:2.1 The diagram below shows the alimentary canal of a farm animal - NSC Agricultural Sciences - Question 2 - 2023 - Paper 1
Step 1
Name the farm animal represented by the alimentary canal in the diagram above.
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Answer
The farm animal represented by the alimentary canal in the diagram is a chicken (or poultry).
Step 2
Give TWO reasons, which are visible in the diagram above, to support the answer to QUESTION 2.1.1.
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Answer
The presence of a crop indicates that this animal stores food temporarily before digestion.
The presence of a gizzard suggests that this animal has a muscular stomach for grinding food, which is typical of poultry.
Step 3
Indicate the pH of the contents of each of the following parts:
(a) B
(b) E
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Answer
(a) The pH of part B is generally acidic.
(b) The pH of part E is generally alkaline.
Step 4
State TWO important digestive functions of the substance secreted in part B.
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Answer
The gastric juice secreted in part B aids in breaking down proteins into peptides, facilitating digestion.
It also provides an acidic environment that helps in killing harmful bacteria present in the food.
Step 5
Indicate the role played by part C in the digestion of food in the diagram above.
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Answer
Part C (the gizzard) plays the role of mechanically grinding the food, which aids in the digestion process by reducing the size of food particles and mixing them with digestive juices.
