Which of the two parts in cockroach are fundamentally similar in structure?

Options

A. Anal styles and labrum
B. Wings and anal cerci
C. Maxillae and legs
D. Mandibles and antennae

Explanation

To determine which two parts in a cockroach are fundamentally similar in structure, we can analyze the options provided and understand the anatomy of the cockroach.

### Step-by-Step Solution:

1. **Understanding the Options**:
- The question provides four pairs of structures: anal cerci and labrum, wings and anal cerci, maxillae and legs, mandibles and antennae.
- We need to identify which pair shares a fundamental similarity in their structure.

2. **Analyzing Each Pair**:
- **Anal cerci and labrum**: These structures serve different functions and are not similar in structure. The anal cerci are sensory appendages at the rear, while the labrum is a mouthpart.
- **Wings and anal cerci**: Wings are used for flight, while anal cerci are sensory structures. They are not structurally similar.
- **Maxillae and legs**: Maxillae are mouthparts that help in feeding and consist of three parts (protopodite, endopodite, and exopodite). Legs are locomotory appendages that consist of five parts (coxa, trochanter, femur, tibia, and tarsus). Despite their different functions, both maxillae and legs are appendages and share a similar basic structure as they are segmented.
- **Mandibles and antennae**: Mandibles are also mouthparts used for chewing, while antennae are sensory organs. They are not structurally similar.

3. **Conclusion**:
- After analyzing all options, the pair that is fundamentally similar in structure is **maxillae and legs**. Both are appendages with a segmented structure, which makes them similar in their basic anatomical design.

### Final Answer:
The two parts in a cockroach that are fundamentally similar in structure are **maxillae and legs**.

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