Diagrams A and B show the ventral (bottom) view of the skulls of two organisms - NSC Life Sciences - Question 3 - 2022 - Paper 2
Question 3
Diagrams A and B show the ventral (bottom) view of the skulls of two organisms. The diagrams are NOT drawn to scale.
3.1.1 Which diagram represents the skull of a b... show full transcript
Worked Solution & Example Answer:Diagrams A and B show the ventral (bottom) view of the skulls of two organisms - NSC Life Sciences - Question 3 - 2022 - Paper 2
Step 1
Which diagram represents the skull of a bipedal organism?
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Answer
The diagram that represents the skull of a bipedal organism is Diagram B.
Step 2
Give ONE visible reason for your answer to QUESTION 3.1.1.
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Answer
In Diagram B, the foramen magnum is positioned more forward compared to Diagram A, indicating a bipedal structure.
Step 3
Tabulate TWO visible differences between the jaw types in diagrams A and B that represent trends in human evolution.
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Answer
Feature
Diagram A
Diagram B
Canine size
Larger canines
Smaller canines
Tooth arrangement
Jaws with teeth in a rectangular/U shape
Jaws with teeth on a gentle/round curve
Step 4
Explain the significance of the shape of the spine that is associated with the skull in diagram B.
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Answer
The spine in Diagram B is shaped in an S-curve, which supports the upper body weight and aids in shock absorption. This shape is crucial for flexibility, allowing effective bipedal locomotion.
