Cambrian

109,11-22. Tankard, A.J., Jackson, M.P.A., Eriksson, K.A., Hunter, D.R., Hobday, D.K. and Minter, W.E.L. (1982).Crustal evolution of southern Africa-3.8 billion years of earth history. SPRINGER-VERLAG NEW YORK, INC, USA. Hira, H.G. (1998). The Cambrian Metallogeny of KwaZulu-Natal. MSc. Thesis(unpublished), Rhodes University.Grahamstown. Houghton, S.H. (1969). Geological History of Southern Africa. Cape Town: Cape&Traansvaal Printers. Johnson, M.R., van Vuuren, C.J., Visser, J.N.J., Cole,…

million years ago. The more simple an organism the less Hox genes/clusters it contains, and the more complex the organisms the more Hox gene clusters are formed. The first Hox gene cluster arose 520 million years ago, therefore animal life during the Cambrian period began to see great diversification. Overtime an increase in the formation of Hox clusters lead to the evolution of complex terrestrial vertebrates, such as amphibians and reptiles. Other aspects of species evolution are heterochrony,…

Darwin’s Theory. Darwin was known to be the father of evolutionary biology. Charles Darwin once said, “When I view all begins not as special creations, but as the lineal descendants of some few beings which lived long before the first bed of the Cambrian system was deposited, they seem to me to become ennobled.” Charles Darwin’s original Theory of Evolution has evolved itself with a modern understanding of his theories, and an overall impact on lives and society. First of all, Charles Darwin’s…

Remarkable Creatures chronicles the stories of landmark scientific events and the biologists behind them- following the creation of Darwin’s unprecedented theory of natural evolution. The events mentioned in the book were all centered around the concepts of evolution and the origin of species. The first part of the book details the journeys of Charles Darwin and Alfred Wallace, young collectors turned into naturalists as they travelled around the globe searching for exotic specimens to take home…

Evolution is factual despite the great amount of people who don’t believe in the recent discoveries. There are numerous facts supporting Darwinian evolution, in which, Scientists today are finding species splitting in two, observing natural selection changing animals and plants before our eyes, and discovering more and more fossils capturing change in the past-dinosaurs that have sprouted feathers, fish that have grown limbs. Jerry Coyne eloquently shows that evolution does not destroy the…

The Permian Mass Extinction Introduction There are five major extinctions in history: the Late Devonian, the Ordovician-Silurian, the Permian-Triassic, the Triassic-Jurassic, and the Cretaceous-Tertiary. Known as the Big Five, these extinctions exceeded all others in size and destruction, each killing more than 60% of species from that period. Each one acted as a bottleneck, allowing the survival of only a fraction of the organisms that had been thriving before, from which evolution and life…

the USA. It has a total strike distance of 3000 Km and consists of three major realms, the Laurentian, Axial, and the Peri-Gondwanan Realm. These realms all have smaller zones within them that were accreted to the Laurentian craton from the early Cambrian to the early Ordovician. The building of the Appalachian Orogeny can be attributed to the accretion of exotic terranes and volcanic island arcs that were present in the Iapetus Ocean. The Iapetus Ocean is the ocean preceding the…

The Great Smoky Mountains is where Thomas Wolfe’s play The Mountains takes place. Although Wolfe doesn’t delve deep into the environment of the mountains themselves one can feel the mountains surrounding the play itself. The Great Smoky Mountains is a place full of plant life and animals. Surrounding all this plant life and animals are the mountains themselves and the history they tell. The Great Smoky Mountains at its highest areas is roughly about 6000 feet above sea level (Hadley 1). These…

The Evolving Planet exhibit at the Field Museum of Natural History is a work of art that thoroughly explains the story of life through evolution. The exhibit begins by informing us about organic compounds coming to be on earth and how all living organisms require organic compounds. It moves on to explain single cell organisms developing from organic compounds and then becoming self-sufficient using energy from the sun. These single-cell organisms grew into more complex beings with genetic…

"Animalia" redirects here. For other uses, see Animalia (disambiguation). Animals Temporal range: Cryogenian – Present, 670 –0Ma Had'nArcheanProterozoicPha. Animal diversity.png About this image Scientific classification e Domain: Eukaryota (unranked): Unikonta (unranked): Opisthokonta (unranked): Holozoa (unranked): Filozoa Kingdom: Animalia Linnaeus, 1758 Phyla List of animal phyla Synonyms Metazoa Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia. With…