The mouth parts of all insects contain the similar structures and so they are

Options

A. 1)Analogous organs
B. 2)Homologous organs
C. 3)Vestigial organs
D. 4)Atavistic organs

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks about the mouthparts of all insects and what type of organs they represent based on their structural similarities.

2. **Identifying the Structures:** The mouthparts of insects include several similar structures: labrum, labium, mandibles, maxillae, and hypopharynx. These structures are present in various insects, indicating a commonality.

3. **Analyzing the Options:**
- **Option A: Analogous Organs** - These are organs that have different structures but perform similar functions. This does not apply here since the mouthparts have similar structures.
- **Option B: Homologous Organs** - These are organs that have similar structures but may serve different functions. This fits the description of insect mouthparts, as they share a common structure but can have different functions depending on the insect species.
- **Option C: Vestigial Organs** - These are organs that were functional in the past but are no longer useful. This does not apply to insect mouthparts.
- **Option D: Atavistic Organs** - These are organs that reappear after being absent for a period. This is not relevant to the mouthparts of insects.

4. **Conclusion:** Based on the analysis, the correct answer is **Option B: Homologous Organs**, as the mouthparts of insects have similar structures but can have different functions.

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