Question

Respiration without a distinct respiratory organ occurs in

• A. Cockroach
• B. Frog
• C. Earthworm
• D. Fish

Answer 1

The correct option is C Earthworm

Earthworms lack specialized distinct organs for respiration. The respiratory exchange occurs through a moist body surface into their bloodstream. Earthworms do not have specialized respiratory organs as we do they take in oxygen and expel carbon dioxide directly through their skin. Oxygen diffuses through the earthworm's body surface and diffuses inward to the network of capillaries lying just under the body surface.

So the correct answer is 'Earthworm'.