The cuticle is a structure formed by several layers of lipids whose main component is the cutin. The cuticle is formed and secreted by the cells of the epidermis of the plant, whose function is to protect the plant from the attack of fungi and bacteria since the cuticle represents the first barrier between the plant and the pollutants of the atmosphere.
At the top of the epidermis of a plant you will find the cuticle, which is a waxy covering and the cuticle protects the plant. The endodermis is in the middle of the plant and is a layer of cells.
Brown fat cells have numerous mitochodria that have the uncoupling protein 1 (UCP-1). This protein is used to dissipate the proton-motive force generating heat (becomes important during cold temperatures) and uncoupling oxidative phosphorylation.