The tissue layers of a leaf,from the upper surface to the lower surface,are
A)epidermis,cuticle,mesophyll layer,epidermis.
B)cuticle,epidermis,spongy mesophyll,palisade mesophyll,epidermis,cuticle.
C)epidermis,palisade layer,spongy layer,epidermis.
D)cuticle,epidermis,palisade mesophyll,spongy mesophyll,epidermis,cuticle.
E)epidermis,cuticle,palisade mesophyll,spongy mesophyll,cuticle,epidermis.

Question

Quizplus · Accepted Answer

The correct order of tissue layers in a leaf, from upper to lower surface, is cuticle, epidermis, palisade mesophyll, spongy mesophyll, epidermis, and cuticle. This is because the cuticle is a waxy layer that helps prevent water loss, and the epidermis is the outermost layer of cells that protects the inner tissues. The palisade mesophyll layer contains the bulk of the chloroplasts responsible for photosynthesis, while the spongy mesophyll layer has a loosely packed arrangement of cells that allows for gas exchange. Finally, there is another layer of epidermis and cuticle on the lower surface to provide additional protection. Choice D is the only option that correctly lists these layers in the correct sequence.

The Tissue Layers of a Leaf,from the Upper Surface to the Lower