Answer;
Orange.
Protective actions are listed in the green- and orange-bordered pages of the Emergency Response Guidebook.
Explanation;
Hazardous materials are regulated by several different government agencies. The five main federal agencies involved in hazardous materials regulation are the Pipeline and Hazardous Materials Safety Administration (PHMSA), Occupational Health and Safety Administration (OSHA), Nuclear Regulatory Commission (NRC), Environmental Protection Agency (EPA), and Department of transport (DOT).
It is a virus; they are not a type of cell
Selective permeability is when a cell membrane allows some molecules or ions to pass through it, but not others.