The scientific classification of Petunia and Sugar Apple 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 Sugar Apple kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Petunia and Sugar Apple family is a major factor of Petunia and Sugar Apple 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 Sugar Apple belongs to the family Annonaceae.
While comparing scientific classification, Petunia and Sugar Apple genus and other classification are also important. Also, when you compare Petunia and Sugar Apple, 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 Annona. Petunia tribe is Not Available and Sugar Apple tribe is Abreae. Petunia clade is Angiosperms, Asterids and Eudicots and order is Solanales whereas Sugar Apple clade is Angiosperms and Magnoliids and order is Magnoliales. Every plant have subfamilies. Petunia subfamilies are, Petunioideae and Sugar Apple subfamilies are Maloideae. In this way you can compare scientific classification of Petunia and Sugar Apple and other products also.