Exchange of `O_(2)" and "CO_(2)` at the respiratory surface occurs through

In insects, respiratory gas exchange occurs through

In insects, respiratory gas exchange occurs through

In insects, respiratory gas exchange occurs through

In insects, respiratory gas exchange occurs through

Respiratory exchange in seeds occur through

Exchange of O_(2) with CO_(2) by simple diffusion over the body surface occurs in all of the following except (A) Sponges (B) Insects (C) Flatworms (D) Coelenterates

Major part of CO_(2) is transported to respiratory surface

In Nereis, gaseous exchange occurs through