INTRODUCTION

Many recognized species on Earth are classified according to their presumed evolutionary relationship. Taxonomy is the branch of biology concerned with identifying, naming, and classifying organisms. Today, taxonomists use the following categories of classification: species, genus, family, order, class, phylum and kingdom. Recently, a higher taxonomic category, the domain, has been added to this list.Kingdom is the second highest taxonomic rank below domain. It is divided into categories called phyla, each phylum is divided into classes, each class into orders, each order into families, each family into genera, and each genus into species.

Living organisms are subdivided into 5 major kingdoms, including the Monera, the Protista, the Fungi, the Plantae, and the Animalia. Each kingdom is further subdivided into separate phyla or divisions. Generally "animals" are subdivided into phyla, while "plants" are subdivided into divisions. Organisms in any given Kingdom maybe separated from organisms in any other Kingdom by many hundreds of millions, if not billions, of years of evolution.

This book provides information about the five kingdoms of life. It will give you knowledge on how organisms grouped and classified. You will also learn the different microorganisms that do exist on Earth.
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Five Kingdoms of Life..
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Once upon a time, all living things were lumped together into two kingdoms, namely plants and animals. Animals included every living thing that moved, ate, and grew to a certain size and stopped growing. Plants included every living thing that did not move or eat and that continued to grow throughout life. It became very difficult to group some living things into one or the