Two organisms are present in the same class but not in the same...

An order is a group of families that share similar characteristics. However, the defining features within an order are less specific compared to those found within families or genera. You have seen earlier that categories like species, genus and families are based on a number of similar characters. Generally, order and other higher taxonomic categories are identified based on the aggregates of characters. Order being a higher category, is the assemblage of families which exhibit a few similar characters. The similar characters are less in number as compared to different genera included in a family. Plant families like Convolvulaceae, Solanaceae are included in the order Polymoniales mainly based on the floral characters. The animal order. Carnivora, includes families like Felidae and Canidae.