Q1Multiple choice
Respiration in insects is called direct because
- a.The cell exchange O2/ CO2 directly with the air in the tubes
- b.The tissues exchange O2/ CO2 directly with coelomic fluid
- c.The tissues exchange O2/ CO2 directly with the air outside through body surface
- d.Tracheal tubes exchange O2/ CO2 directly with the haemocoel which then exchange with tissues