What are primary, secondary and tertiary roots ?

Explanation

To understand the concepts of primary, secondary, and tertiary roots, let's break it down step by step:

### Step 1: Definition of Primary Roots
- **Primary Roots** are the first roots that emerge from a seed during germination. They grow vertically downwards into the soil. This root serves as the main anchor for the plant and is crucial for absorbing water and nutrients.

### Step 2: Definition of Secondary Roots
- **Secondary Roots** are smaller lateral roots that grow from the primary root. They branch out from the primary root and help to increase the surface area for absorption of water and nutrients. These roots typically grow horizontally and can also provide additional stability to the plant.

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