At one point in history, all organisms were classified as either animals or plants. Which question could be asked in order to show the problems associated with this type of model? A How many types animals exist in the world? B Are bacteria considered plants or animals? C Can subsystems further classify the plants and animals? D How is an animal classified? PLEASE HURRY!!!

Achemist wants to extract copper metal from copper chloride solution. the chemist places 0.50 grams of aluminum foil in a solution containing 0.75 grams of copper (ii) chloride. a single replacement reaction takes place. (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction? a) approximately 0.36 grams, because copper (ii) chloride acts as a limiting reactant b) approximately 1.8 grams, because copper (ii) chloride acts as a limiting reactant c) approximately 0.36 grams, because aluminum acts as a limiting reactant d) approximately 1.8 grams, because aluminum acts as a limiting reactant