To determine the group of animals in which jointed appendages are found, we can follow these steps:
### Step 1: Understand Jointed Appendages
Jointed appendages are limbs or body parts that have joints, allowing for flexibility and movement. They are a characteristic feature of certain animal groups, particularly arthropods.
### Step 2: Identify the Group of Animals
The primary group of animals known for having jointed appendages is the **Arthropoda**. This group includes insects, arachnids, crustaceans, and myriapods.
### Step 3: Analyze the Options Provided
We need to evaluate the options given in the question to see which group contains animals with jointed appendages.
1. **Option 1: Lemulus, Apis, and Lacephar**
- **Lemulus**: A type of horseshoe crab (an arthropod).
- **Apis**: Honeybee (an insect, also an arthropod).
- **Lacephar**: Likely refers to a group of insects.
- **Conclusion**: All these animals have jointed appendages.
2. **Option 2: Lemulus, Neres, and Lacephar**
- **Neres**: A genus of polychaete worms (not arthropods, do not have jointed appendages).
- **Conclusion**: This option contains an animal without jointed appendages.
3. **Option 3: Locust, Flea, and Snail**
- **Locust**: An insect (arthropod).
- **Flea**: An insect (arthropod).
- **Snail**: A mollusk (does not have jointed appendages).
- **Conclusion**: This option contains an animal without jointed appendages.
4. **Option 4: Unio, Lemulus, and Lacephar**
- **Unio**: A freshwater mussel (mollusk, does not have jointed appendages).
- **Conclusion**: This option contains an animal without jointed appendages.
### Step 4: Select the Correct Option
Based on the analysis, the first option (Lemulus, Apis, and Lacephar) is the only group that contains animals with jointed appendages.
### Final Answer
The group of animals in which jointed appendages are found is **Option 1: Lemulus, Apis, and Lacephar**.
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