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Global biodiversity is the measure of biodiversity on planet Earth and is defined as the total variability of life forms. More than 99 percent of all species [1] that ever lived on Earth are estimated to be extinct. [2][3] Estimates on the number of Earth's current species range from 2 million to 1 trillion, but most estimates are around 11 ...
The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. [2] [3] [4] About 14% of these had been described by 2011. [4] All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs.
The presence of steranes, eukaryotic-specific biomarkers, in Australian shales previously indicated that eukaryotes were present in these rocks dated at 2.7 billion years old, [21] [85] but these Archaean biomarkers have been rebutted as later contaminants. [86] The oldest valid biomarker records are only around 800 million years old. [87]
The authors note that these estimates are strongest for eukaryotic organisms and likely represent the lower bound of prokaryote diversity. [18] Other estimates include: 220,000 vascular plants, estimated using the species-area relation method [19] 0.7-1 million marine species [20] 10–30 million insects; [21] (of some 0.9 million we know today ...
Over 1.5 million living animal species have been described, of which around 1.05 million are insects, over 85,000 are molluscs, and around 65,000 are vertebrates. It has been estimated there are as many as 7.77 million animal species on Earth. Animal body lengths range from 8.5 μm (0.00033 in) to 33.6 m (110 ft).
November 1, 2018 – 2028. Website. www.earthbiogenome.org. The Earth BioGenome Project (EBP) is an initiative that aims to sequence and catalog the genomes of all of Earth's currently described eukaryotic species over a period of ten years. [1] The initiative would produce an open DNA database of biological information that provides a platform ...
The examples described below represent different modes of speciation and provide strong evidence for common descent. Not all speciation research directly observes divergence from "start-to-finish". This is by virtue of research delimitation and definition ambiguity, and occasionally leads research towards historical reconstructions.
Portal:Zoology. Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia (/ ˌænɪˈmeɪliə /). With few exceptions, animals consume organic material, breathe oxygen, have myocytes and are able to move, can reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development.