Question

What are guard cells?​

Answer 1

Answer:

The guard cells are cells surrounding each stoma. They helps to regulate that rate of transpiration by opening and closing the stomata. Light is the main trigger for the opening and closing. Each gaurd cell has a relatively thick cuticle on the pore-side and a thin one opposite it.

Explanation:

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Answer 2

Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata.