Bark is the natural 'skin' of a tree and therefore the answer to your question.
A thin covering on wood is veneer.
Yes! For example, some bugs (such as ants) have an exoskeleton. This is an external skeletal covering.
Shedding external covering refers to the process in which an animal, typically reptiles or arthropods, molts or sheds its outer layer of skin or exoskeleton to allow for growth or to remove parasites. This shedding process helps the animal to maintain its health and vitality.
bark
yes, the have an external covering to protect from water infiltration
An arthroderm is an external covering of an arthropod.
The hard external covering of insects is made of a substance called chitin.
husked
Molting
yes losers
An external covering is a covering that is on the outside of an object. This could be anything from skin on humans to hard coverings like those on amoebas, fur on animals like bats, and scales on reptiles.
veneer