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Niklas Karlsson

Tree of Life Web Project - 1 views

  • The Tree of Life Web Project (ToL) is a collaborative effort of biologists and nature enthusiasts from around the world. On more than 10,000 World Wide Web pages, the project provides information about biodiversity, the characteristics of different groups of organisms, and their evolutionary history (phylogeny).
Niklas Karlsson

CK12.ORG FlexBooks - Chapter Detail - History of Life - 0 views

  • Tools: The Fossil Record, Aging the Ages, and Molecular Clocks By age three, you probably knew that dinosaurs are part of the history of life. Our understanding of where they belong in the tale is relatively recent, but “dragon bones” have been known for thousands of years in China and Europe. Fossils are preserved remains or traces of organisms that provide extremely rare but vivid windows to the past. Because most parts of organisms decompose rapidly following death, fossilization is an exceptionally uncommon occurrence, and usually preserves only hard body parts, shown in Figure below. Remains must be covered by sediment almost immediately. Buried organisms may experience mineralization (occasionally even within cells), or they may decay, leaving a space within the sediment later replaced with rock. Alternative pathways to fossilization include freezing, drying, trapping in resin (amber) or burial in anoxic (oxygen-free) environments. Trace fossils preserve footprints, burrows, droppings, eggs, nests, and other types of impressions. Overall, a great variety of types of fossils reveal the history of life, shown in Figure below.
  • A Geologic Time Scale Measures the Evolution of Life
  • Patterns and Processes of Macroevolution
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  • A family tree of living things summarizes our understanding of the history of life and shows that humans and animal
Niklas Karlsson

NatureGate - 0 views

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    Spännade sida för att nyckla finska växter och djur! Undrar om det fungerar i mobilen. 
Niklas Karlsson

YouTube - Discovering the Great Tree Of Life - 0 views

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    Intressant för #gy11bio
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