There are many reasons for the division of cells as cells divide to replace old, dead or damaged cells. Cells divide so that living things can grow. Organisms grow not because cells are getting larger but because cells are dividing to produce more and more cells. In human body, about two trillion cells divide every day. In cell division, the cell that is dividing is called the ‘parent’ cell. Parent cell divides into daughter cells and this process is repeated known as cell cycle. There are three ways for cell to divide depending upon its type of cell- Amitosis, Mitosis and Meiosis. Each of these methods of cell division has special characteristics.
Cellular level is the most important and fundamental level in the organisation of living world. So in order to understand the Cell Biology we should study all the aspects of structure and functions of cell. Also, it is necessary to understand the difference between plant and animal cell.
The main aim of a taxonomy study is to assign organism an appropriate place within the systematic framework of classification and this framework is known as taxonomic hierarchy by which the taxonomic groups are arranged in a definite order, from higher to lower categories. A category is called taxon and used in the classification of plants or animals as kingdom, phylum, class, order, genus and species. Further Whittaker in 1959 classified living organisms into following five kingdoms or broad categories.
The cell is the structural and functional unit of living organisms. It was discovered by Robert Hooke in 1665. Cell in Latin means “little room”. Many organisms, such as bacteria, protozoa and yeasts consist of single cell called Unicellular Organisms and complex organisms are known as Multicellular Organisms made up of many cells.
Taxonomy is the Science of classification which makes the study of wide variety of organisms easy and helps us to understand the interrelationships among different groups of organisms. In Plant Kingdom the first level of classification depends whether plant body is differentiated, have special tissues for transportation, ability to bear seeds and whether the seeds are enclosed within fruits or not.
An atom is a particle of matter that uniquely defines a chemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged.
Data mining (the analysis step of the "Knowledge Discovery in Databases" process, or KDD) is a field at the intersection of computer science and statistics, and is the process that attempts to discover patterns in large data sets.