One common feature of the trachea of cockroach and the trachea of mammals is that

Options

A. both are paired
B. both have ciliated inner lining
C. both originate from the head
D. both have non-collapsible walls

Answer

To solve the question regarding the common feature of the trachea of cockroaches and mammals, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Trachea**:
- Both cockroaches and mammals have a tracheal system that is responsible for the transport of air.

2. **Examine the Options**:
- The options provided are:
1. Both are paired
2. Both have ciliated inner lining
3. Both originate from the head
4. Both have non-collapsible walls

3. **Analyze Each Option**:
- **Option 1**: "Both are paired" - This is incorrect as the trachea is typically a single structure in both groups.
- **Option 2**: "Both have ciliated inner lining" - This is not true for cockroaches, as their trachea does not have cilia.
- **Option 3**: "Both originate from the head" - While the trachea does connect to the head in both, this is not a unique feature.
- **Option 4**: "Both have non-collapsible walls" - This is true. The trachea in both organisms has structural adaptations (like the spiral thickening of cuticle in cockroaches) that prevent collapse.

4. **Conclusion**:
- The common feature of the trachea in both cockroaches and mammals is that they both have non-collapsible walls. Thus, the correct answer is option 4.

### Final Answer:
The common feature of the trachea of cockroach and the trachea of mammals is that **both have non-collapsible walls**.

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