The scientific classification of Petunia and Apple Tree includes the entire classification chart that includes kingdom, family, clade, tribe etc. A kingdom is the second highest taxonomic rank. A taxonomic rank is the level that a living organisms are placed in hierarchical level of arrangement of life forms. All the living organisms are divided into kingdoms. Plant kingdom is a main classification of living organisms that include all plants. There are six kingdoms which are: Plantae, Animalia, Fungi, Protista, Aschaea/Archaeabacteria and Bacteria Eubacteria. Petunia and Apple Tree kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Petunia and Apple Tree family is a major factor of Petunia and Apple Tree Scientific Classification. Plant family helps you narrow the search of your plants. It also gives you idea about, how the plant looks, how the seed will be like etc. These two plant families can be different or same. Petunia belongs to the family Solanaceae and Apple Tree belongs to the family Rosaceae.
While comparing scientific classification, Petunia and Apple Tree genus and other classification are also important. Also, when you compare Petunia and Apple Tree, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Petunia and other plant's genus is Malus. Petunia tribe is Not Available and Apple Tree tribe is Not Available. Petunia clade is Angiosperms, Asterids and Eudicots and order is Solanales whereas Apple Tree clade is Angiosperms, Eudicots and Rosids and order is Rosales. Every plant have subfamilies. Petunia subfamilies are, Petunioideae and Apple Tree subfamilies are Not Available. In this way you can compare scientific classification of Petunia and Apple Tree and other products also.