Mark the incorrect one:

Options

A. Some plant species accumulate selenium
B. All discovered elements have not been reported in plants
C. All the elements found in plants are essential for plants
D. Radioactive strontium can be present in plants growing near nuclear sites.

Answer

To solve the question, we need to identify the incorrect statement among the provided options regarding mineral nutrition in plants. Let's analyze each statement step by step:

### Step 1: Analyze the Statements
1. **Statement 1**: Some plant species accumulate selenium.
- This statement is correct. Certain plants like barley, wheat, alfalfa, and western wheatgrass can accumulate selenium.

2. **Statement 2**: All discovered elements have not been reported in plants.
- This statement is also correct. Out of the 105 discovered elements, only about 60 have been reported as essential or present in plants.

3. **Statement 3**: All the elements found in the plants are essential for plants.
- This statement is incorrect. Not all elements found in plants are essential; some are non-essential and do not play a role in plant metabolism.

4. **Statement 4**: Radioactive strontium can be present in plants growing near nuclear sites.
- This statement is correct. Radioactive strontium can be taken up by plants due to its chemical similarity to calcium.

### Step 2: Identify the Incorrect Statement
From the analysis, we see that:
- Statement 1 is correct.
- Statement 2 is correct.
- Statement 3 is incorrect.
- Statement 4 is correct.

Thus, the incorrect statement is **Statement 3**: "All the elements found in the plants are essential for plants."

### Final Answer
The incorrect statement is **Statement 3**.

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