Question

guard cells of the stomata regulate what
a) The amount of water b) Loss of water c) Photosynthesis d) All the above​

Answer 1

all the above

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.