Question

What do the guard cells in the dermal tissue of a plant do?

-extend into the soil and increase the surface area of the root
-control the passage of carbon dioxide, oxygen, and water vapor
-form a hard covering that turns into lignin and wood
-allow the plant to move in response to sunlight

Answer 1

control the passage of CO2, O2 and water vapour. the guard cells control the opening and closing of the stomata, and the stomata are pores in the membrane which allow the gases to diffuse in and out

Answer 2

control the passage of carbon dioxide, oxygen, and water vapor

Step-by-step explanation:

Guard cells are specialized plant cells in the epidermis of leaves, stems and other organs that are used to control gas exchange. They are produced in pairs with a gap between them that forms a stomatal pore.