The products of a chemical equation are C*O_{2} and 2H_{2} * O . Which set of atoms must make up the equation's reactants so that the equation models the law of conservation of mass?

The number of living organisms in a particular area is

Patient has just received an organ transplant which treatment would be most effective in preventing the patient’s body from

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.