Structure that helps the cockroach to walk on smooth surfaces is
(a) Trochanter
(b) Plantulae
(c) Cardo
(d) Scape

Options

A. Trochanter
B. Plantulae
C. Cardo
D. Scape

Answer

To determine the structure that helps the cockroach to walk on smooth surfaces, we can analyze the options provided:

1. **Understanding the Question**: The question asks for a specific structure in cockroaches that aids in walking on smooth surfaces.

2. **Analyzing the Options**:
- (a) **Trochanter**: This is a part of the leg but is not specifically responsible for grip on smooth surfaces.
- (b) **Plantulae**: These are fleshy pads located on the tarsus of the cockroach's legs that provide grip on smooth surfaces.
- (c) **Cardo**: This is a part of the mouthparts of the cockroach and does not relate to walking.
- (d) **Scape**: This is a part of the antenna and is not involved in locomotion.

3. **Identifying the Correct Answer**: Based on the analysis, the structure that helps cockroaches walk on smooth surfaces is the **Plantulae** (option b). These fleshy pads enhance grip, allowing the cockroach to traverse smooth surfaces effectively.

4. **Final Answer**: Therefore, the correct answer is **(b) Plantulae**.