Adult bird normally possess only one functional
(a) Ureter
(b) Ovary
(c) Kidney
(d) Testis

Options

A. Ureter
B. Ovary
C. Kidney
D. Testis

Answer

To solve the question "Adult bird normally possess only one functional," we need to analyze the options provided:

1. **Understanding the Options**:
- (a) Ureter
- (b) Ovary
- (c) Kidney
- (d) Testis

2. **Analyzing Each Option**:
- **Ureter**: Birds have two ureters, one for each kidney, so this option is not correct.
- **Ovary**: In adult birds, typically only the left ovary is functional. The right ovary does not mature and remains rudimentary. Therefore, this option is a strong candidate.
- **Kidney**: Birds possess two kidneys, so this option is also not correct.
- **Testis**: Male birds have a pair of testes, so this option is not correct either.

3. **Conclusion**:
Based on the analysis, the correct answer is (b) Ovary, as adult birds normally possess only one functional ovary (the left one).

**Final Answer**: (b) Ovary

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