Guard cells are located in the leaf epidermis and pairs of guard cells surround and form stomatal pores, which regulate CO2 influx from the atmosphere into the leaves for photosynthetic carbon fixation.
Stomatal guard cells also regulate water loss of plants via transpiration to the atmosphere.
The primary function of the respiratory system is to supply blood with oxygen
The earth rotates on its axis
Answer: Integration
Explanation: take the de and add in that is how you get the answer
hope this helps <em>:</em><em>)</em>