How is a fossil record evidence for evolution

Fossils are the dead remnants of ancients flora and fauna that are buried millions of years ago. These fossils are found to be present in the sedimentary rocks. These fossils are very important in order to understand the evolutionary pattern of the organisms, their food habitat and also the past climatic and environmental conditions.

These fossils play a key role in determining the way the organisms have undergone evolution. The earliest fossil found on earth belongs to the rocks of Western Australia that dates back to about 3.5 billion years. The fossils belonging to the pre-historical time were very simple, and the fossils that belong to the recent ages are very complex. This marks the pattern of how evolution has taken place. The earth has experienced episodic mass extinction events that wiped out more than 90% of the living species on earth, but only those organisms survived which were able to adapt to the changing environmental conditions.

These organisms have undergone evolution with the gradual increase in time, forming more, new and complex types of living species. Some of the fossils are also found that records the entire evolution pattern. For example, the evolutionary pattern of the horse has a complete record.

a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.[1] the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years.[2] fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.[3] other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.

the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763".[4] the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.[5]

in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world.[6] non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%.[7] world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.[8]