What are stomata? Give two functions of stomata.

Explanation

**Step-by-Step Solution:**

1. **Definition of Stomata:**
Stomata are tiny openings or pores found primarily on the lower surface of leaves. They are surrounded by specialized cells known as guard cells.

2. **Function 1 - Gas Exchange:**
One of the primary functions of stomata is to facilitate the exchange of gases. They allow carbon dioxide (CO2) to enter the leaf for photosynthesis and enable oxygen (O2) to exit as a byproduct of this process.

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