What Structure of the Guard Cells Allows Them to Expand

question 20

Multiple Choice

What structure of the guard cells allows them to expand outward instead of spherically when inflated with water?

• A)thick outer walls in contact with epidermal cells
• B)thin inner walls that border the stomata
• C)thin outer walls in contact with epidermal cells
• D)thick inner walls that border the stomata
• E)a pericycle within the stomata

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Definitions:

Formation

A rock unit that is distinct, laterally traceable, and mappable; also used as an informal term for an eroded, perhaps unusually shaped, mass of rock.

Cross Beds

Sedimentary layers deposited at an angle to the horizontal, typically formed by wind or water currents.

Well-sorted

Describes sediment in which grains are of nearly the same size.

Sand Grains

Small particles of minerals or rocks, typically found in beaches, deserts, and riverbeds, sized between 0.0625 to 2 millimeters.