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Soft Bodied Animals Early Cambrian Rocks Large
1,105 wordsIn Namibia, where the rock record is excellent, Vendian fossils are followed immediately by Cambrian fossils, and they may have overlapped briefly in time. In Siberia, a whole suite of small shelly fossils appears in the rocks as the Cambrian period begins, together with sponges of several different types. Most of the small shells are tiny cones and tubes that we don't understand properly, but at least some of them are complex animals, including the first molluscs. Soon, archaeocyathid sponges w...
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Time Of Death Dead Bodies
1,280 words... are occur. Subtract the first occurrence time with the discovery time, call this time A. Rear the blow flies to adults, let them mate, let them lay eggs on raw beef liver under conditions similar to the crime scene, take the time from opposition to the first occurrence of 1. instar larvae. Call this time B. By subtracting B-A, one gets C, which is an estimate of the time since opposition to discovery. Similar calculations can be done for other instars as well. If one has good base-line data ...
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Life On Earth Origin Of Species
877 wordsBiology came of age on November 24, 1859, the day Charles Darwin published On The Origin of Species by Means of Natural Selection. His book presented the first convincing case for evolution and led the way in the emergence of biology from a bewildering chaos of facts into a cohesive science. In biology, evolution refers to all the changes that have transformed life on Earth from its earliest beginnings to the seemingly infinite diversity that characterizes it today. Darwin addressed the sweeping...
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Native People Indigenous People
536 wordsThe film Medicine Man gives a very clear indication of the consequences of habitat destruction. In the film, a professor and his research assistant sets out to find a plant that holds the cure of cancer, only to have it destroyed by land clearing in the Amazon Basin. The land clearing also severely disrupts the peaceful, sustainable lifestyle of a tribe of natives and a huge amount of flora and fauna. It shows us the damage we wrought with our deforestation on a slightly exaggerated, nut no less...
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Rapid Expansion Blue Green
1,211 wordsUp until 1947, it was believed that the Cambrian Explosion marked the first true abundance of multicellular life. However, this was discovered to be untrue after Sir Douglas Mawson and R. C. Spring mistakenly came across numerous "fossil jellyfish" in the Ediacaran Hills while observing what was originally believed to be sandstones belonging to the lowest strata of the Cambrian. At first, these finding were dismissed as "fortuitous inorganic markings. " (AAS Biographical Memoirs. ) Several years...
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Physical Environment Ability T
805 wordsEcosystem Succession and Nutrient Retention Outline: Introduction Identification of definitions Paper goals Body Various Ecosystems Role of nutrients Conclusion Future research offers Possible applications of research results This research article deals with ec system success and nutrient retention. Ecsystem's are pen systems in which biochemical functions consist f inputs frm varius sources, ut puts t varius sinks and a variable degree f internal recycling (Peter M. Vitusek and William A. Reine...
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Taking Into Account Lava Flows
1,159 wordsWhat event occurred at the division between the Triassic and Jurassic periods, and why was this important to the dinosaurs? The extinction is a topic that now requires rather more digging than talking. The Triassic and Jurassic periods were remarked by changes that influenced both: relief and biologic forms of life. The dinosaurs were the most typical representatives of fauna for the Triassic and Jurassic periods. These periods are characterized by tectonic activity, worsening of climate conditi...
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Million Years Ago Mass Extinction
10,014 wordsEarth probably began Extinction Introduction Earth probably began about 4. 5 billion years ago. A history of this life on Earth is recorded in fossil remains and traces of past life. It is a record of evolution for both life and the planet. Life and the planet have co-evolved, with life causing changes to the planet which in turn drive changes in life. The Fossil Record A history of these changes is recorded in the layers or strata of rock laid down over the millions of years, and by changes in ...
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