Life
Life on Earth: Non-cellular life ( viruses ) * * Cellular life Bacteria Archaea Eukarya Protista Fungi Plantae Animalia Life (cf. biota ) is a characteristic that distinguishes objects that have signaling and self-sustaining processes (biology) from those that do not
Abiogenesis
In natural science , abiogenesis ( pronounced /ˌeɪbaɪ.ɵˈdʒɛnɨsɪs/ , AY -bye-oh- JEN -ə-siss ) or biopoesis is the study of how life on Earth could have arisen from inanimate matter . It should not be confused with evolution , which is the study of how groups of already living
Fungus
Subphyla Incertae sedis Entomophthoromycotina Kickxellomycotina Mucoromycotina Zoopagomycotina A fungus (pronounced /ˈfʌŋɡəs/ ; pl. fungi)) is a member of a large group of eukaryotic organisms that includes microorganisms such as yeasts and molds , as well as the more familiar
Phylogenetic nomenclature
The terms cladism and cladist were first introduced by Ernst W. Mayr in 1965. They sometimes refer to cladistics as a whole, but often in particular the former refers to phylogenetic nomenclature and those who advocate a taxonomy founded on cladistics, going beyond mere use of phylogenetic
Plant
When the name Plantae or plants is applied to a specific taxon, it is usually referring to one of three concepts. From smallest to largest in inclusiveness, these three groupings are: Name(s) Scope Description Land plants , also known as Embryophyta or Metaphyta. Plantae sensu strictissimo
Biological classification
Modern biological classification has its root in the work of Carolus Linnaeus , who grouped species according to shared physical characteristics. These groupings have since been revised to improve consistency with the Darwinian principle of common descent . Molecular phylogenetics , which
Monera
Under the three-domain system of taxonomy established in 1991, the organisms formerly within Monera have been divided into two domains , Archaea and Bacteria (with Eukaryote as the third domain). Contents 1 History 2 Summary 3 See also 4 References 5 External links
Kingdom (biology)
In biology , kingdom (Latin: regnum , pl. regna ) is a taxonomic rank , which is either the highest rank or in the more recent three-domain system , the rank below domain . Kingdoms are divided into smaller groups called phyla (in zoology) or divisions in botany. The complete sequence of
Evolutionary history of life
The evolutionary history of life on Earth traces the processes by which living and fossil organisms evolved. It stretches from the origin of life on Earth, thought to be over 3,500 million years ago , to the present day. The similarities between all present day organisms indicate the presence
Evolution
The main source of variation is mutation , which introduces genetic changes. These changes are heritable (can be passed on through reproduction ), and may give rise to alternative traits in organisms. Another source of variation is genetic recombination which shuffles the genes into new combinations
