Lateral line sense organs are present in

Options

A. cyclostomes
B. fishes
C. amphibians
D. all of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the presence of lateral line sense organs in certain animal groups.

2. **Identifying the Groups**: The options provided include cyclostomes, fishes, and amphibians. All these groups belong to the subphylum Vertebrata, which is a part of the phylum Chordata.

3. **Defining Lateral Line Sense Organs**: Lateral line sense organs are specialized structures that detect changes in the environment, particularly in aquatic environments. They help in sensing water movements, pressure changes, temperature variations, pH levels, and salinity.

4. **Presence in Groups**:
- **Cyclostomes**: These are jawless fish like lampreys and hagfish, which have lateral line systems.
- **Fishes**: Most fish species possess lateral line systems to navigate and detect prey or predators in the water.
- **Amphibians**: Many amphibians, especially during their larval stages (like tadpoles), also have lateral line systems.

5. **Conclusion**: Since all three groups (cyclostomes, fishes, and amphibians) possess lateral line sense organs, the correct answer to the question is "all of these."

**Final Answer**: Lateral line sense organs are present in all of these (cyclostomes, fishes, and amphibians).

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