Right ovary, right oviduct, and urinary bladder have atrophied in which one of the following

Options

A. Kiwi
B. Pigeon
C. Kingfisher
D. All of these

Answer

To solve the question regarding which organism has atrophied right ovary, right oviduct, and urinary bladder, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Atrophy**: Atrophy refers to a reduction in size or wasting away of an organ or tissue. In this context, it means that the right ovary, right oviduct, and urinary bladder are reduced in size or have diminished in function.

2. **Identifying the Context**: The question is specifically asking about which group of animals exhibits this atrophy. We need to consider the characteristics of different animal groups, particularly birds.

3. **Birds and Their Adaptations**: Birds have unique adaptations that facilitate flight. One of these adaptations is the reduction of certain organs to minimize weight. This includes the right ovary and right oviduct, which are often reduced or absent in many bird species.

4. **Cloaca Function**: Birds possess a cloaca, which is a single opening that serves multiple functions, including excretion and reproduction. This anatomical feature reduces the need for a fully developed right ovary and oviduct, as well as a urinary bladder.

5. **Conclusion**: Based on the adaptations of birds for flight, the correct answer to the question is that the right ovary, right oviduct, and urinary bladder have atrophied in birds.

### Final Answer:
The right ovary, right oviduct, and urinary bladder have atrophied in birds.