Question

Guard cells

2 points
1. Series of reactions in which a molecule of glucose is broken down.
2. Stomata are flanked by them, and they swell or shrink by taking in or losing water.
3. Process that doesn't need oxygen.
4. Plant capable of synthesizing its own food from simple organic substances.

Answer 1

2) Stomata are flanked by them...

Transpiration is controlled by opening and closing of the stomata, which is accomplished through swelling or shrinking of guard cells.