According to this system, the tree of life consists of three domains: Archaea, Bacteria, and Eukarya. The first two are all prokaryotic microorganisms, or mostly single-celled organisms whose cells have no nucleus.

All of life can be divided into three domains, based on the type of cell of the organism: Bacteria: cells do not contain a nucleus. Archaea: cells do not contain a nucleus; they have a different cell wall from bacteria. Eukarya: cells do contain a nucleus.

The common characteristics of Archaebacteria known to date are these: (1) the presence of characteristic tRNAs and ribosomal RNAs; (2) the absence of peptidoglycan cell walls, with in many cases, replacement by a largely proteinaceous coat; (3) the occurrence of ether linked lipids built from phytanyl chains and (4) in …

There are three major known groups of Archaebacteria: methanogens, halophiles, and thermophiles. The methanogens are anaerobic bacteria that produce methane. They are found in sewage treatment plants, bogs, and the intestinal tracts of ruminants. Ancient methanogens are the source of natural gas.

There are three domains of life, the Archaea, the Bacteria, and the Eucarya. Organisms from Archaea and Bacteria have a prokaryotic cell structure, whereas organisms from the domain Eucarya (eukaryotes) encompass cells with a nucleus confining the genetic material from the cytoplasm.

The diversity of life has generally been divided into a few — four to six — fundamental ‘kingdoms’. The most influential system, the ‘Whittaker’ five kingdom structure, recognises Monera (prokaryotes) and four eukaryotic kingdoms: Animalia (Metazoa), Plantae, Fungi and Protista.

Three-domain system It has been demonstrated that some organisms have parts of their genes that are not used in making proteins and other organisms that use entire genes to code for proteins, with no unused portions. This information has informed the three-domain system.

Explanation: In all three domains, the hereditary material is DNA; their cellular metabolism is based on proton gradients which drive ATP synthesis (using the same protein system, ATP synthase); they all have phospholipid-based membranes, and they use protein catalysts (enzymes) to speed up metabolic processes.

Three-domain system Archaea (primitive bacteria usually living in extreme environments) Bacteria (true bacteria) Eukaryota (including protists, fungi, plants and animals)

Five kingdoms

animal kingdom

The Animal Kingdom contains these seven Phyla: Porifera, Cnidaria, Platyhelminthes, Annelida, Mollusca, Arthropoda, and Chordata. The bodies of animals are made up of differentiated tissues to perform an equally specialized task, sometimes in to or three levels of differentiation (excluding sponges).

Until recently the system devised by Robert Whittaker in 1968 was widely adopted. Whittaker’s classification scheme recognizes five kingdoms: Monera, Protista, Fungi, Plantae, and Animalia.

Protists reproduce asexually by budding and binary fission. Binary fission is a form of multiple fission and is also considered the most typical form of reproduction in the protista kingdom.

Whittaker

Animalia

Five Kingdom Classification System

• Monera (includes Eubacteria and Archeobacteria) Individuals are single-celled, may or may not move, have a cell wall, have no chloroplasts or other organelles, and have no nucleus.
• Protista.
• Fungi.
• Plantae.
• Animalia.
• A “mini-key” to the five kingdoms.

Each kingdom is then divided into subcategories, or phyla. These kingdom examples make up a classification system for all living things on Earth….Kingdoms in Biology.

A domain is a taxonomic category above the kingdom level. The three domains are: Bacteria, Archaea, and Eukarya, which are the major categories of life. A kingdom is a taxonomic group that contains one or more phyla. The four traditional kingdoms of Eukarya include: Protista, Fungi, Plantae, and Animalia.

Plants: Kingdom Plantae. Plants are living organisms belonging to the kingdom Plantae. They include familiar organisms such as trees, herbs, bushes, grasses, vines, ferns, mosses, and green algae.

1 : a politically organized community or major territorial unit having a monarchical form of government headed by a king or queen. 2 often capitalized. a : the eternal kingship of God. b : the realm in which God’s will is fulfilled.

A kingdom is a piece of land that is ruled by a king or a queen. A kingdom is often called a monarchy, which means that one person, usually inheriting their position by birth or marriage, is the leader, or head of state. Kingdoms are one of the earliest types of societies on Earth, dating back thousands of years.

The two-kingdom classification was proposed by Carolus Linnaeus. He categorised and classified the living organisms on the basis of nutrition and mobility. The living organisms were classified into Kingdom Plantae and Kingdom Animalia.

Both the Old and New Testaments refer to the word, kingdom, as the rule and reign of a king, (1.) and not usually a territory. So kingdom of heaven can be understood to mean, “rule of God”.