Evolution: Understanding Life on Earth
نویسندگان
چکیده
منابع مشابه
The origin and early evolution of life on Earth.
We do not have a detailed knowledge of the processes that led to the appearance of life on Earth. In this review we bring together some of the most important results that have provided insights into the cosmic and primitive Earth environments, particularly those environments in which life is thought to have originated. To do so, we first discuss the evidence bearing on the antiquity of life o...
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(Current Biology 16, R395–R400; June 6, 2006) In our recent primer, "The Co-Evolution of Life and Earth," when discussing the evolution of hydrogenosomes ("Example 2"), we accidently wrote "Recently, genetic material was extracted from the hydrogenosome of Trichomonas ovalis .." There is no organism called ‘‘Trichomonas ovalis.’’ Rather, we meant to write ‘‘Nyctotherus ovalis.’’ For more detail...
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“We’re related to the grass”, our biology teacher once proclaimed in his South Tyrolean accent that was at the same time unmistakable and highly liable to impersonation. Our 14-year-old, hormone-clouded minds can perhaps be forgiven for not immediately fathoming the profound scientifi c truth behind this statement, but looking back now, it stuck as poignant way of encapsulating what is perhaps ...
متن کاملThe Origin of Life on Earth
LESLIE E. ORGEL is senior fellow and research professor at the Salk Institute for Biological Studies in San Diego, which he joined in 1965. He obtained his Ph.D. in chemistry from the University of Oxford in 1951 and subsequently became a reader in chemistry at the University of Cambridge. While at Cambridge, he contributed to the development of ligandfield theory. The National Aeronautics and ...
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Nitrogen is the most common element in Earth’s atmosphere and also appears to be present in significant amounts in the mantle. However, its long-term cycling between these two reservoirs remains poorly understood. Here a range of biotic and abiotic mechanisms are evaluated that could have caused nitrogen exchange between Earth’s surface and interior over time. In the Archean, biological nitroge...
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ژورنال
عنوان ژورنال: BioScience
سال: 2002
ISSN: 0006-3568
DOI: 10.1641/0006-3568(2002)052[0644:euloe]2.0.co;2