Question

One of the following animals does not use tracheae as the respiratory organs. This animal is :
(a) grasshopper
(b) prawn
(c) mosquito
(d) cockroach

Answer 1

option (b) prawn

because it is not an insect.

Tracheal Systems

Many terrestrial animals have their respiratory surfaces inside the body and connected to the outside by a series of tubes.Tracheae are these tubes that carry air directly to cells for gas exchange. Spiracles are openings at the body surface that lead to tracheae that branch into smaller tubes known as tracheoles. Body movements or contractions speed up the rate of diffusion of gases from tracheae into body cells. However, tracheae will not function well in animals whose body is longer than 5 cm.

Respiratory system in an insect