Name one function and one deficiency symptom of the following elements :
iron

Explanation

### Step-by-Step Solution:

1. **Identify the Element**: The element in question is iron (Fe).

2. **Function of Iron**:
- Iron is absorbed by plants in the form of ferric ions (Fe³⁺).
- One of its primary functions is that it plays a crucial role in electron transfer processes within the plant cells.
- Additionally, iron is essential for the activation of the enzyme catalase, which helps in breaking down hydrogen peroxide into water and oxygen.
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