Which animal respires but there is no respiratory organ?

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for an animal that can respire but does not have a specialized respiratory organ.

2. **Analyzing the Options**: The options provided are frog, cockroach, fish, and earthworm. We need to evaluate each of these animals based on their respiratory structures.

3. **Evaluating Each Animal**:
- **Frog**: Frogs have lungs, which are specialized organs for respiration. Therefore, they do not fit the criteria.
- **Cockroach**: Cockroaches have a tracheal system, which is a network of tubes that function as their respiratory organ. Thus, they do not meet the requirement either.
- **Fish**: Fish possess gills, which are specialized organs for extracting oxygen from water. Hence, they are also not the correct answer.
- **Earthworm**: Earthworms do not have any specialized respiratory organs. They respire through their skin, a process known as cutaneous respiration, where gases diffuse directly through the moist skin surface.

4. **Conclusion**: Since the earthworm is the only animal listed that does not have a specialized respiratory organ and relies on its skin for respiration, it is the correct answer.

**Final Answer**: The animal that respires but does not have a respiratory organ is the **earthworm**.

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