THE KINGDOMS OF LIFE
On our planet earth we have what are called kingdoms, 5 to be exact, consisting of a very diverse group of living things. Using these five kingdoms we classify our species and organize information on what we are and what resides with us. When we place every living creature into one of the five kingdoms it better helps us understand the world around us and it's habitants. The five kingdoms include: Moneran, Protist, Fungi, Plantae, and the one we call home, Animalia.
The simplest of all organisms is the bacteria of the Moneran kingdom. They are broken down into two types: Eubacteria and Archaebacteria. Eubacteria is known as the “true bacteria” which makes up the roughly 10,000 species in the Moneran group. Archaebacteria or "ancient bacteria" if you will, is the minority of the group and are only found in extreme environments including but not limiting; swamps, salt lakes, deep-ocean hydrothermal vent, etc. There are many types of species belonging to the Moneran kingdom that have yet to be discovered. Monerans are also the only group within the five kingdoms that are all prokaryotes. Prokaryotes are one-celled or colony of cells.
In this kingdom we have multi cellular organisms (Protista) which are not a part of nor do they fit, the Animal, Plant, or Fungus Kingdom. In the beginning, protozoa were placed in a sub-kingdom of Animalia but because of the problems this classification had, it later became it's own kingdom. All members of this phylum have what are known as nucleated cells and live in aquatic habitats (both freshwater and marine). According to Lynn Margulis, K.V. Schwartz and M. Dolan (1994), the cells of all Protoctista originally formed by bacterial symbioses or symbiogenesis. Members of this kingdom are not considered animals because they do not come from an embryo, they are not plants nor are they...
References: Life Kingdoms Review (2003-2010) website: http://www.biology-questions-and-answers.com/life-kingdoms.html
Five Kingdoms of Life (Jan 29, 2008) Drisdelle, Rosemary website:http://www.suite101.com/content/five-kingdoms-of-life-a43074
Kingdom (biology) Wikipedia; last modified: January 7th, 2011 website: http://en.wikipedia.org/wiki/Kingdom_%28biology%29
Scamardella, Joseph M. (1999), "Not plants or animals: a brief history of the origin of Kingdoms Protozoa, Protista and Protoctista", International Microbiology 2 (4): 207–16, PMID
# ^ Cavalier-Smith, T. (1998), "A revised six-kingdom system of life", Biological Reviews 73 (03): 203–66, doi:10.1017/S0006323198005167, http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=685
Please join StudyMode to read the full document