Cacti have thick stems and skins because they need to store water over long periods of time, and the liquid would evaporate quickly in deasert conditions.
No its the ouside of a tree.
the outer covering of the plant
An example of a thick stem is the edible stem of the Rhubarb plant.
Parts of a stem are tubes and covering
it is thick
A tree is one example. The sunflower usually has a thick stem. Rhubarb is another (edible stalk) thick stemmed plant.
A tree and the woody stem is called the trunk
The coniferous trees of Taiga biome have needle like dark green leaves, stem with thick bark and leaves with waxy covering to resist extremely cold winters. These plants are evergreen with very thick plant stand and conical canopy.
A trunk ;)
flower power
A tuber.
Yes they do