Plant and animal life is sensitive to changes in the chemistry of the environment. 植物和动物体对环境化学成分的变化非常敏感。
A fold or pair of folds of the body wall that lines the shell and secretes the substance that forms the shell in mollusks and brachiopods. 套膜软体动物或腕足动物体壁上的膜或套膜,它连接壳体并分泌形成壳的物质。