Atreeless area between the icecap and the tree line of arctic regions having a permanently frozen subsoil and supporting low-growing vegetation is referred to as a

yep the answer would be c have a nice day:)

lysosomes contain a variety of enzymes, enabling the cell to break down various biomolecules it engulfs, including peptides, nucleic acids, carbohydrates, and lipids (lysosomal lipase). the enzymes responsible for this hydrolysis require an acidic environment for optimal activity. hope i !

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.