Ostrich have one urinary bladder, whereas all other birds have

Options

A. two urinary bladders
B. no urinary bladders
C. one paair urinary bladders
D. two pairs of urinary bladders

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question states that ostriches have one urinary bladder, and we need to identify the urinary bladder situation in all other birds.

2. **Analyzing Ostrich's Urinary System:** It is known that ostriches possess one urinary bladder. This is a unique characteristic among birds.

3. **Examining Other Birds:** Most birds, unlike ostriches, do not have a urinary bladder. For example, species like parrots and many common birds excrete waste without a urinary bladder.

4. **Identifying Waste Excretion in Birds:** The primary method of waste excretion in birds is through uric acid. This is excreted as a semi-solid waste along with feces, which is efficient for conserving water.

5. **Conclusion on the Options:** The options provided include:
- Two urinary bladders
- No urinary bladders
- One pair of urinary bladders
- Two pairs of urinary bladders

Since most birds do not have a urinary bladder, the correct answer is "no urinary bladder."

6. **Final Answer:** Therefore, the answer to the question is that all other birds have **no urinary bladder**.

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