Is rubber a primary metabolite or a secondary metabolite? Write four sentences about rubber.

Explanation

**Step-by-Step Solution:**

1. **Identify the Type of Metabolite:**
Rubber is classified as a secondary metabolite. Secondary metabolites are organic compounds that are not directly involved in the normal growth, development, or reproduction of an organism.

2. **Definition of Secondary Metabolites:**
Unlike primary metabolites, which are essential for basic cellular functions and growth (like carbohydrates, proteins, and lipids), secondary metabolites do not have a known role in these processes. They are often involved in plant defense mechanisms or other ecological functions.

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