Wings are vestigial in
(a) Male Blatta
(b) Female Blatta
(c) Male Periplaneta
(d) Female Periplaneta

Options

A. Male Blatta
B. Female Blatta
C. Male Periplaneta
D. Female Periplaneta

Answer

To solve the question regarding which option has vestigial wings, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Term "Vestigial":**
- Vestigial structures are remnants of organs or structures that had a function in an early ancestor but have lost most or all of their original function in a later species.

2. **Identify the Organisms:**
- The question presents options related to two types of cockroaches: Blatta and Periplaneta. Specifically, it refers to male and female of each type.

3. **Research the Characteristics of Blatta and Periplaneta:**
- Blatta is often referred to as the oriental cockroach, while Periplaneta refers to the American cockroach.
- It is known that in the case of the oriental cockroach (Blatta), the females have reduced or vestigial wings.

4. **Analyze the Options:**
- (a) Male Blatta: Males have fully developed wings.
- (b) Female Blatta: Females have vestigial wings.
- (c) Male Periplaneta: Males have fully developed wings.
- (d) Female Periplaneta: Females have fully developed wings.

5. **Conclusion:**
- Based on the information, the correct answer is (b) Female Blatta, as they possess vestigial wings.

### Final Answer:
(b) Female Blatta

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