What is the shape of guard cells in dicot plants?

Explanation

**Step-by-Step Solution:**

1. **Understanding Guard Cells**: Guard cells are specialized cells that surround each stoma (the small openings on the surface of leaves) and play a crucial role in regulating gas exchange and transpiration in plants.

2. **Function of Guard Cells**: The primary function of guard cells is to control the opening and closing of stomata. This regulation helps manage water loss through transpiration and allows for the exchange of gases (like oxygen and carbon dioxide) necessary for photosynthesis.

3. **Shape of Guard Cells in Dicot Plants**: In dicotyledonous plants (dicots), the guard cells are typically shaped like a bean. This unique shape allows them to effectively open and close the stomata.

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