Classification of the Phylum Annelida The term annelida has been coined from either Greek word annulus meaning small rings of French word annular meaning arranged like small single rings. They are the first coelomate animals and as regarded as metamerically segmented animals. Definition: The animal group who are triploblastic, coelomate and whose bodies are metamerically [...]
The term Aschelminthes has been derived from two Greek words, Askos- means cavity, and helmins-worm together its means animals with internal body cavity. The members of this phylum occupy all habitable space of the earth. History- Grobded first coined the term Aschelminthes. The older workers like Gagenbaur (1851), Huxley (1875) etc. included many other groups [...]
The phylum Platyhelminthes include free-living as well as parasitic animals. The free-living flatworms live in springs, sands, streams or in bodies of salt water. On the other hand, parasitic form of each species has its own particular habitat. They are widely distributed among human beings and other vertebrates. Definition: A group of flat or ribbon [...]
There are differences between single celled animals the Protozoa and multicellular animals- the Metazoa. Typical metazoan characteristics are first found in Cnidaria, tissue grades of construction first appeared in Cnidaria. From taxonomic point of view members of the Phylum Cnidaria are regarded as first metazoan animal.
What is ecosystem? Ecosystem is the structural and functional unit of the Biosphere, constituted by some living organisms, and non-living materials through which material moves and energy cascades. How can you classify ecosystem from a structural point of view? Classification on the basis of structure or Biome classification is as follows: 1. Terrestrial Ecosystem: Tundra, [...]
