The scientific classification of Corn and Birch 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. Corn and Birch kingdom and all other plants kingdom is Plantaea.
Plant family is the group of plants which have something in common. Corn and Birch family is a major factor of Corn and Birch 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. Corn belongs to the family Poaceae and Birch belongs to the family Betulaceae.
While comparing scientific classification, Corn and Birch genus and other classification are also important. Also, when you compare Corn and Birch, other factors should also be taken into considerations like order, subfamilies, tribe, clade etc. First plant's genus is Zea and other plant's genus is Betula. Corn tribe is Andropogoneae and Birch tribe is . Corn clade is Angiosperms, Commelinids and Monocots and order is Poales whereas Birch clade is Angiosperms, Eudicots and Rosids and order is Fagales. Every plant have subfamilies. Corn subfamilies are, Panicoideae and Birch subfamilies are Carpinaceae. In this way you can compare scientific classification of Corn and Birch and other products also.