Characteristics used for hierarchical classification of living organisms are:-
1. Their cellularity whether unicellular or multicellular.
2. The mode of nutrition.
3. The mode of reproduction.
b. Characteristics means features or qualities of any organism.
c. The characteristics of body design used for classification of plants is different from those used for classifying animals because the basic body designs are different based on the need to prepare food or obtain it by consuming other organisms. Organisms that produce their own food have structures like chloroplasts which contain pigments like chlorophyll necessary for synthesis of food.
Organisms that acquire food lack structures for the production of food and completely dependent on the others organisms for their nutrition.