The gas exchange surface of an earthworm is .............. whereas of a beetle is ......................

Explanation

To answer the question, we need to identify the gas exchange surfaces for both the earthworm and the beetle.

1. **Identify the gas exchange surface of an earthworm:**
- Earthworms do not have specialized respiratory organs like lungs. Instead, they perform gas exchange through their skin. This process is known as cutaneous respiration, where oxygen is absorbed and carbon dioxide is released through the moist skin of the earthworm.

2. **Identify the gas exchange surface of a beetle:**
- Beetles, being insects, have a different respiratory system. They do not breathe through lungs but instead use a network of tubes called tracheae. Air enters the tracheae through openings on the body called spiracles. The tracheae facilitate the exchange of gases directly with the tissues.

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