Thale cress (Arabidopsis thaliana) is a small flowering plant belongs to the kingdom Plantae under the Angiosperms. It belong to Eudicots. It is also known as mouse-ear cress or arabidopsis . it is a popular model organism in Botany and genetics. Even if it is a complex multicellular eukaryote, it has a relatively small genome and have the smallest genome in all flowering plants.