Question

Which of these cells of the dermal tissue of plants prevent water loss and control gas exchange?
a. phloem cells
b. companion cells
c. parenchyma cells
d. guard cells. user: when a plant grows as mediated by growth hormones, which main plant organs are at work

Answer 1

The answer is D ) Guard Cells. 
Guard cells are like a door, they let somethings in and some things out or think of it like a filter it lets certain things in  and  out

Answer 2

The answer is d guard cells i just too the test