The usefulness of radiocarbon dating is limited self updating excel graphs
Paleozoic Timeline of Plant Evolution (wiki) - Photosynthesis Horseshoe Crab Living Fossil is an extant taxon that closely resembles organisms otherwise known only from the fossil record. Carboniferous is a geologic period and system that spans 60 million years from the end of the Devonian Period 358.9 million years ago (Mya), to the beginning of the Permian Period, 298.9 Mya. Hangenberg Event is a bioevent that occurred at the end of the Famennian epoch (late Devonian) associated with the Late Devonian extinction (roughly 358.9 ± 0.4 million years ago); Bioevent is an event recognised in a sequence of sedimentary rocks, where there is a significant change in the biota as recorded by assemblages of fossils over a relatively short period of time.
As a rule, to be considered a living fossil, the fossil species must be old relative to the time of origin of the extant clade. It has been defined as "short-term (hours or days to kyrs) locally, regionally, or interregionally pervasive changes in the ecological, biogeographical, and/or evolutionary character of biotas that are isochronous or nearly so throughout their range".
Nevertheless, it remains the most accurate means of dating the scientific community has discovered so far. We’ve also recorded an entire episode of Astronomy Cast all about How Carbon Dating Works.
Until such time that another method becomes available – and one that produces smaller margins of error – it will remain the method of choice for archeology, paleontology, and other branches of scientific research.
Land plants began to diversify in the Late Silurian, from around 430 million years ago, and the results of their diversification are displayed in remarkable detail in an early Devonian fossil assemblage from the Rhynie chert.
This chert, formed in volcanic hot springs, preserved several species of early plants in cellular detail by petrification.
Plants and animals absorb both C-12 and C-14 in the course of their natural lifetimes simply by carrying out these basic functions.
It is naturally radioactive and unstable, and will therefore spontaneously decay back into N-14 over a period of time.Snowball Earth Choanoflagellate are a group of free-living unicellular and colonial flagellate eukaryotes considered to be the closest living relatives of the animals.Protein Domain is a conserved part of a given protein sequence and (tertiary) structure that can evolve, function, and exist independently of the rest of the protein chain. Prior to the Cambrian explosion, most organisms were simple, composed of individual cells occasionally organized into colonies.By 600 million years ago, the oxygen in the atmosphere reached about one-fifth of today’s level (21 percent).(3.9 Billion Years since the Birth of Earth, and 2.9 Billion Years since Microorganisms Formed)The earth was completely covered in Ice.