2 major classification or division kindom metazoa

. Blue green algae (cyanobacteria) represent another major group of prokaryotes. Cyanobacteria are characterised by the presence of phycocyanin (blue) and chlorophyll (green) pigments. The Kingdom Protista includes primitive unicellular eukaryotic organisms. Protista are mainly represente..

One of the main characteristics used in defining grades of animal complexity is the presence or absence of tissues. Tissues are the aggregations of embryologically and morphologically similar cells that become arranged to perform specific functions. The protozoans occur as single cells or colonies ..

This division is made up of plants that bear flowers and seeds and make up the majority of the larger plants. The body is differentiated into true stem, leaves and roots. Propagation of the plant takes place with the help of seeds. Seeds are formed as a result of sexual reprodu..

. These key characters enable the students of taxonomy to easily identify and assign any angiosperm plant to its family. Bentham and Hooker have grouped advanced, seed bearing plants into a major division called Phanerogamia. This division has been divided into three c..

Summary - All multicellular animals are now placed in the kingdom of Metazoa. The multicellular animals show a very specific body organisation which ranges from cellular grade to organ system grade. Higher in the hierarchy of animal kingdom, one can recognise appearance of specific featur..

The Linnaean Hierarchy - The Linnaean system of classification consists of a hierarchy of graded taxonomic (named) ranks that are called as taxa . Any given taxon (singular) may contain several lower taxa, which can be usually distinguished based on certain common characteristics. Such lo..

Introduction - Animals can be broadly distinguished into two major groups the nonchordates (or invertebrates) and the chordates.Invertebrates account for more than 95% of the animal species that have been identified. These are animals which do not have a vertebral column or a ba..

Cancer Biology and Therapy - Cancer is characterised by uncontrolled growth and division of certain body tissues, so forming a tumour. It is one of the major killers today. Normally cell division is a regulated process. Mature cells are replaced by new cells produced b..

These protistans fall under thephylum - Chryosophyta and are commonly called as diatoms . There are more than 5,000 species of diatoms. They are microscopic, unicellular, protistans which represent a major part of phytoplanktons both in fresh water and marine water. Diatoms occur in vario..

Differences between Mitosis and Meiosis - DIFFERENCES BETWEEN MITOSIS AND MEIOSIS EVENTS MITOSIS MEIOSIS Occurrence In all the body cells including germ cells. Only in the germ (reproductive) cells. Definition It is an equational division. It is a reductional division. Number of..