Saturday, February 23, 2019

First Steps Film Assignment Essay

The fol mooing eng get onment is based on the select become Human Episode 1 First Steps. You may access the film in the following ways 1. It is available for free on the phosphate buffer solution website at the following address http//video.pbs.org/video/1312522241/2. It is available instantly by means of Netflix (where you may temporarily set up a free placard for a few weeks if you atomic number 18 not a member).Please aim complete sentences to answer the following questions and type your answers on this form. You should submit this assignment to the First Steps dropbox using the Assignments tab by Sun 4/1 at 1159 P.M. Please submit this accommodate as a .doc, .docx, .rtf, or .pdf file. Please do not practice session the .pages extension because PCs ejectnot open it.1. Where is the Afar located?Afar is one of the social club Regional States of Ethiopia and is located in north eastern Africa. It is a diverge of the great rift v everyey (deep cut in earth where geologic forces are ripping Africa apart).2. How did researchers figure out how old the Selam fossil was?Clues to the age of the fossil came from key features in the landscape such as the uninfected bands of volcanic ash that dated 3.4 million old age ago. If the white bands of volcanic ash are 3.4 million years old then the fossil must be younger because it was found above it. Therefore, the fossil was close to 3.3 million years old.3. How did researchers figure out how old the fossil pip-squeak Selam was when she died? How old was she?Researchers looked at Selams teething in order to convalesce out how old she was when she died. They did not look at the baby teeth that were visible in her jaw they looked her adult teeth that were growing wrong the pearl. From that observation researchers know Selam died when she was three years old.4. What are the human-like components of the Lucy skeleton? What are the ape-like components?Lucky had both human-like and ape-like components. From t he cannon down lucy was like piece and from the waist up she was like apes. She walked upright like humans and her pelvis bone resembled those of a human. Lucys greater trochanter was short and human-like. Her skeleton showed evidence of low-down skull capacity similar to apes. 5. What was the ancient environment of the australopithecines like? How does it change by 3-4 million years ago?Researchers have found that Seguda Valley went done a huge transformation. It was once covered entirely of water, up to an cover of approximately 580 meters. The valley was filled with a great lake that was steeper than all of the great lakes. The entire African continent apply to be a lot wetter than it is present day. Long ago, before even Selam and Lucys existence Africa was a wet tropical environment covered with rain forest. Eventually Africa began to dry out and the rain forests shrank. During Selams existence, 3-4 million years ago, Africa was a mosaic of contrastive environments. Re searchers know that from the fossils that live there, they tell a story of a vanished landscape. Fossils of creatures like a pig and hippopotamus. Today it is a vast expanse of volcanic rock and burning desert.6. What are some of the different hypotheses presented in the film for why bipedalism emerged?One supposition is that the mammals stood up to be able to see over tall grass. Second theory is that they stood up to be able to pick fruit off low branches of trees. (The way chimpanzees do today.) Third theory is that they stood up to cool to a greater extent efficiently. Not as much sun beating on the body. * near compelling hypothesis is that it saved us energy.7. What is the molecular clock and how is it used to determine when two species last shared a common ascendent?It is a simple root that the rate of change in deoxyribonucleic acid sequences is more or less constant over time a way of determining if and when two species shared a common ancestor. By counting the diffe rences in the genetic code between chimps and humans researchers can calculate how long they have been evolving away from each-other. (5-7 years ago humans and apes shared a common ancestor.)8. What is the clue that the Toumai fossil (Sahelanthropus tchadensis) is bipedal?The decisive clue that the Toumai fossil is bipedal is how the skull connects to the spine. Researcher Michele could confer that by the mannikin of Toumais skull. If the skull is placed on a neck of an ape that walks on all fours its eyes point down ward (not correct). If the skull is placed on an upright spine of a biped its eyes point straight ahead for Michele this proved that Toumai walked upright.9. How are the first stone tools identifiable as tools? Who is currently thought to be the first stone tool manufacturer?The first stone tools were broken in a very concomitant way there is a method behind how the rocks were broken in order to make it into a tool. serviceman habilis (1.6-2.5 million years ago) ar e thought to be the first stone tool makers.10. What is Rick Potts idea about the role of climate in hominid adaptation? How is it different from traditional ideas?Rick Potts observations let him to the new idea, rapid change as a catalyst for our evolution.11. What was going on with the African climate when Homo habilis evolved?Africa had numerous climate changed from wet to dry, wet to dry, wet to dry all within approximately a thousand years.

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