It is a thin layer of translucent rectangular cells that form the outer layer of the leaves, protecting the inner layers of the leaf
The surface of the leaf that you see is the "epidermis".
The epidermis covers the lower and upper sides of the leaf.
Answer: the epidermis of a leaf includes: upper epidermis and lower epidermis but if you are referring to the epidermis of an onion: it is only one layer
epidermis is the outermost covering of the leaf
epidermis
The leaf would curve to the upper epidermis exposing the lower epidemis
The outer layer of a leaf is called the epidermis (from a Greek word meaning "over-skin"). Its function is to protect the insides of the leaf, which carry out the chemical reaction known as photosynthesis.
The upper epidermis is responsible for preventing water loss by evaporation. It does this by having a waxy cuticle on the top of the leaf. The lower epidermis has stomata, which allow gases to enter and leave the leaf as a result of photosynthesis and respiration.
Epidermis
Epidermis
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Epidermis.