Which of the following is an incorrect statement about excretion?

Options

A. Excretion takes place in plants.
B. Excretion takes place both in plants and animals.
C. Excretion is the process of getting rid of excess water only.
D. Secretion is one method of excretion.

Answer

To determine which statement about excretion is incorrect, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understand Excretion**: Excretion is the biological process through which waste products are removed from the body. This includes both solid and liquid waste.

2. **Evaluate the Options**:
- **Option 1**: "Excretion takes place in plants."
- This statement is correct. Plants excrete waste through processes like transpiration (loss of water vapor) and guttation (release of excess water through leaf pores).

- **Option 2**: "Excretion takes place both in plants and animals."
- This statement is also correct. Both plants and animals have mechanisms for excretion. Animals excrete waste products like urea, uric acid, ammonia, and solid waste (stool).

- **Option 3**: "Excretion is the process of getting rid of excess water only."
- This statement is incorrect. Excretion involves the removal of various types of waste, including solid waste and not just excess water. Therefore, this statement does not accurately describe excretion.

- **Option 4**: "Secretion is one method of excretion."
- This statement is correct. Secretion involves the release of substances like sweat, which contains waste products such as salt and excess water.

3. **Identify the Incorrect Statement**: Based on the evaluations, the incorrect statement about excretion is **Option 3**: "Excretion is the process of getting rid of excess water only."

### Final Answer:
The incorrect statement about excretion is: **"Excretion is the process of getting rid of excess water only."**