Tracheae of cockroach and mammal are similar in having

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paired nature

ciliated inner lining

non-collapsible walls

origin from head

answer is B.

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Detailed Solution

Trachae act as passage of air during respiration in both cockroach and mammals. In cockroach, the cuticular lining is spirally thickened forming taenidia which prevents the trachael tubes from collapsing. In mammals, cartilaginous ring supporting the walls of the trachae prevent their collapsing.

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