Q.

Cockroach cannot survive in the water because its respiratory organ is -

A. Gill
B. Trachea
C. Book lung
D. Pulmonary Sac
Answer» B. Trachea
Explanation: In tetrapod anatomy, the trachea or windpipe, is a tube that connects the pharynx and larynx to the luhgs, allowing the passage of air. It is lined with pseudo-stratified ciliated columnar epithelium cells with goblet cells that produce mucus. This mucus lines the cells of the trachea to trap inhaled foreign particles that the cilia then waft upward toward the larynx and then the pharynx where it can be either swallowed into the stomach or expelled as phlegm.
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