A-LevelBiologyGas exchange9700/12 · May/June 2013 · Q331 Mark

What can be observed about some of the tissues in a transverse section of a trachea?

Aciliated present in blocks

Bciliated present in C-shaped rings

Cnon-ciliated absent in blocks

Dnon-ciliated absent in C-shaped rings

✓ Correct answer

B: ciliated present in C-shaped rings

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Topic: Gas exchange, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2013 Paper 1 Variant 2, question 33.

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