Question

Respiration in insects is called direct because
(A) The cells exchange 0, /CO, directly with the air in the tubes
(B) The tissues exchange 0, / Co, directly with coelomic fluid
(C) The tissues exchange O2 / CO, directly with the air outside through body surface
(D) Tracheal tubes exchange 0, /co, directly with the hemocoel which then exchange with tissues​

Answer 1

Respiration in insects is called direct because tracheal tubes exchange O2/CO2 directly with the haemocoel which then exchange with tissues.

Answer 2

Option D

tracheal tubes exchange 02/CO2 directly with the hemocoel which then exchange with the tissues