A-LevelBiologyGas exchangeMay/June 2012Paper 1 Q331 Mark
What would be seen in a photomicrograph of the wall of the trachea?
Aelastic fibres: present, epidermis: present, smooth muscle: present
Belastic fibres: present, epidermis: absent, smooth muscle: present
Celastic fibres: present, epidermis: absent, smooth muscle: absent
Delastic fibres: absent, epidermis: present, smooth muscle: absent
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of gas exchange within the Biologysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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