The illegal poaching, trading, transporting, buying or selling something is called what?

The illegal wildlife trade or wildlife trafficking is the commercial process that involves the trade of non-domestic species (animals or plants), or in some cases certain parts of individuals. These species are rare and endangered and thus this practice is harmful and represents an increasing dangers of extinction.

This practice is highly illegal, but unfortunately, at the same time, due to the rarity of the species highly profitable. Efforts are made globally to stop this practice and to avoid the extinction of many endangered species.

answer; both surfaces of the membrane are nonpermeable