mesophyll layer
The mesophyll is located between the upper and lower epidermis.
mesopyll
the epidermis is thicker.
upper epidermis for sure>>>
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
parenchyma
No, the upper epidermis is covered by a cuticle.
Below the upper epidermis and above the lower epidermis.
protects against water loss the same as the upper epidermis do
Mesophyll In between upper and lower epidermis of leaf is mesophyll tissue. In the dorsiventral leaves, mesophyll is divisible into upper palisade cells and lower spongy parenchyma. The palisade cells are mainly involved in photosynthesis and spongy parenchyma in gaseous exchange.
The upper mantle is harder than the lower mantle
the upper epidermis prevents water loss while the lower allows gases to enter and exit, resulting in photosynthesis