Beren Robinson’s Field Study The field study by Beren Robinson is an exceptional study of threespine sticklebacks, which relate to ecology evolution. The original findings of researchers differ from Robinson’s field study. Robinson’s hypothesis states the threespine sticklebacks diverse phenotypes are the creation of natural selection supporting the discrepancy in the population. The variables in the study are diet and environmental conditions. Ecologists use evidence and observation to quantify
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Then and Now Life, is it the same as it was millions of years ago? No, this is because of what is known as evolution. The world is forever changing. There seems to be something new discovered all the time. This maybe because the scientist have not had time to explorer everywhere and everything. However, there could also be another explanation to this, evolution. Evolution is a scientific theory that helps to explain the presences of new varieties of living things, both now, in the present as well
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relate to the process of individuation, the process by which the conscious individual 'harmonises' their psyche (mind). Jung accounts for religion as an expression of the collective unconscious of the species (though Jung may not have agreed with speciation) - religion helps the individuation process. within Jung's concept of the psyche, a three tier system - the personal conscious, the personal unconscious (repressed memories) and the collective unconscious (the blueprint that 'religious' images
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The Evolution of Modern Humans Two origins are considered when thinking about the evolution of modern humans. There’s the “Multiregional Model” that concentrates on a multiple origins theory in which the different human populations or races had independent origins and evolved in isolation from each other, and there’s the recent single-orgin hypothesis or the “Out of Africa” which holds that anatomically modern humans evolved in Africa between 200,000 and 100,000 years ago. With this theory humans
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Speciation is the evolutionary process by which new species are formed. This process is responsible for species diversity over geologic time. Another example of biodiversity evolution is genetic biodiversity. Genetic biodiversity is the variation of the genes
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1 3 (Theodosius Dobzhansky, 1973) • “Nothing in biology makes sense except in the light of evolution.” Understanding Biology… 2 What is biological evolution? 1 V ¨© ¡¦¥¥I % $B ¥¨¥2¥¦ ( %©6¥) £0¦ ©) ¥¦ %! ©"2 8@W@ VW V 0I $ "U §¥&8©SR V V¨ $ $ ¦ £ W H $ H ) ¦ ¤ T ) ¨ 6 $ 2 ¨ ¦ F ©) £§¦ ©) $¥¦ "! ¦"QP ¥© ¡#I H ¦G&4 !¥) ¥@E!¥" $B #! )#A @95) #¦ &8¦ ¥ ' ( ¢7 ) 'D C ¡ $ $ 1 ¡ ¦ $ ¨ 4 2 © ' #¦"2#©6&5)##) #230("0"!"¥) "' &§$"©¦ %! #"¢ 1 ' ¡ '
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Within Class Mammalia and Order Proboscidae, modern day elephants descended from Moeritheriums, which were the approximate size of current day pigs1. Over the course of 50 million years, evolutionary trends have resulted in elephants gradually increasing in size. Although there are only two species of elephants today, the Asian elephant or Elephas maximus and African elephant or Loxodonta africana, it is believed that a single ancestor, the Paleomastodon, evolved into an estimated 352 different elephant
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hePhylogenetic Trees: Diagraming the Evolutionary History of a Group of Organisms Adapted from lab by Dr. Rebecca Irwin and “Constructing Cladogram” from Biology: The Dynamic Science, 2nd edition by Russell, Hertz, and McMillan. **It would greatly benefit you to read the “Constructing Cladogram” example in your text on pg. 514 -515 Goals: 1. Understand how to interpret a phylogeny 2. Understand how to construct a phylogenetic tree using cladistics Background Information: A phylogeny represents
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characteristics of fishes that allow them to live successfully in water. No fishes have limbs with digits. The diversity of forms among fishes provide evolutionary biologists with some of the best examples of natural selection, adaptation, divergence, speciation, and historical development of fauna on scales from regional to continental. Far from being the "dead-end" that we land-dwelling creatures tend to assume, fishes are extraordinarily diverse and their watery habitats provide a vast array of places
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Charles Darwin & Evolution Life Work Evolution Pre Darwinian ideas Variation Natural Selection Sexual Selection Speciation Human evolution The Response to Darwin What about Wallace? Impact Updating Darwin Case Studies Applications Darwin & Cambridge Today For Kids For Teachers Natural Selection Natural selection is Darwin’s most famous theory; it states that evolutionary change comes through the production of variation in each generation and differential survival of individuals with different
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