What adaptations do animals and plants of the tundra have for survival?

To survive in the harsh conditions of the tundra, animals and plants had to adapt. So, for example, all trees and shrubs in the tundra are short (due to constant winds), frost-resistant and have roots that do not grow deep into the icy and non-fertile soil. Animals have a thick layer of fat under the skin, thick skins and thick fur. And also most of them are able to hibernate to wait out the long frosty winter.