Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, evolution, distribution, identification, and taxonomy.Modern biology is a vast and eclectic field, composed of many branches and subdisciplines.[clarification needed] However, despite the broad scope of biology, there are certain general and unifying concepts within it that govern all study and research, consolidating it into a single, coherent field. In general, biology recognizes the cell as the basic unit of life, genes as the basic unit of heredity, and evolution as the engine that propels the synthesis and creation of new species.It is also understood today that all organisms survive by consuming and transforming energy and by regulating their internal environment to maintain a stable and vital condition known as homeostasis.

Mrs.Devi Raman is working as an Associate Professor in the Department of Pharmaceutics, Faculty of Pharmacy, BIHER, Chennai. Mrs.R.JothiLakshmi and Mr.M.VasanthKumar are working as Associated Professors in the Department of Pharmacognosy, Faculty of Pharmacy, Bharath Institute of Higher Education and Research, Selaiyur, Chennai, Tamil Nadu, India.