evolution short note
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hey dear here your answer;
➡ the change in organism over a long period of time is known as evolution.
The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" in 1859.
☺ Hope this helps you deaR ✌✌.
➡ the change in organism over a long period of time is known as evolution.
The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" in 1859.
☺ Hope this helps you deaR ✌✌.
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Evolution is the process of change in all forms of life over generations, and evolutionary biology is the study of how evolution occurs. Biological populations evolve through genetic changes that correspond to changes in the organisms' observable traits. Genetic changes include mutations, which are caused by damage or replication errors in organisms' DNA. As the genetic variation of a population drifts randomly over generations, natural selection gradually leads traits to become more or less common based on the relative reproductive success of organisms with those traits.
The age of the Earth is about 4.54 billion years.The earliest undisputed evidence of life on Earth dates at least from 3.5 billion years ago, during the Eoarchean Era after geological crust started to solidify, following the earlier molten Hadean Eon. Microbial mat fossils in 3.48 billion-year-old sandstone have been found in Western Australia. Other early physical evidence of life includes graphite, a biogenic substance, in 3.7 billion-year-old metasedimentary rocks in western Greenland and, in 2015, "remains of biotic life" found in 4.1 billion-year-old rocks in Western Australia.According to one of the researchers, "If life arose relatively quickly on Earth ... then it could be common in the universe." It is estimated that more than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described.More recently, in May 2016, scientists reported that 1 trillion species are estimated to be on Earth currently with only one-thousandth of one percent described.
The age of the Earth is about 4.54 billion years.The earliest undisputed evidence of life on Earth dates at least from 3.5 billion years ago, during the Eoarchean Era after geological crust started to solidify, following the earlier molten Hadean Eon. Microbial mat fossils in 3.48 billion-year-old sandstone have been found in Western Australia. Other early physical evidence of life includes graphite, a biogenic substance, in 3.7 billion-year-old metasedimentary rocks in western Greenland and, in 2015, "remains of biotic life" found in 4.1 billion-year-old rocks in Western Australia.According to one of the researchers, "If life arose relatively quickly on Earth ... then it could be common in the universe." It is estimated that more than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described.More recently, in May 2016, scientists reported that 1 trillion species are estimated to be on Earth currently with only one-thousandth of one percent described.
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