A Scientist wonders if the amount of Vitamin C that he feeds to rats will have any affect on the rats' mass. He measured both the mass of the rats and the amount of Vitamin C in grams. Identify the controlled variable.
Plsss its due in 15 mins

Adescription of a type of bio biotechnology (genetic engineering, cloning, or artificial section) one benefit or one risk for the individual (based on whether you are for or against it) one benefit or one risk for society (based on whether you are for or against it) one benefit or one risk for the environment (based on whether you are for or against it)