Excretory organs are absent in

Options

A. Animals
B. Plants
C. Protistans
D. Both B and C

Answer

**Step-by-Step Solution:**

1. **Understanding Excretory Organs**: Excretory organs are specialized structures in organisms that help in the removal of waste products from the body. Common examples in animals include kidneys, urinary bladders, and other components of the urinary system.

2. **Analyzing the Options**:
- **Option A (Animals)**: Animals possess well-defined excretory organs, such as kidneys and urinary bladders, which are crucial for waste removal. Therefore, this option is incorrect.
- **Option B (Plants)**: Plants do not have specialized excretory organs like animals. Instead, they primarily lose waste through processes like transpiration, where water vapor is released through stomata. However, they do not have a dedicated excretory system. This option is a candidate for the correct answer.
- **Option C (Protistans)**: Protistans, which are mostly unicellular organisms, also lack specialized excretory organs. They typically expel waste products through their cell membranes. This option is also a candidate for the correct answer.

3. **Identifying the Correct Answer**: Since both plants (Option B) and protistans (Option C) lack specialized excretory organs, the correct answer is that excretory organs are absent in both B and C.

4. **Final Answer**: The correct option is "both B and C".

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