Still Retains Significant Arboreal Anth 130 Cuyma

Beginning in the late Miocene and into the early Pliocene, upright walking tendencies began to develop among the hominin tribe. Upright walking tendencies slowly transformed into obligate bipedalism during the pliocene within the hominin lineage. This shift in locomotor strategy is notably marked by the gradual change in arm to leg ratio that we see when comparing early and later hominins. Early hominins have short legs and very long arms while later hominins have longer legs and short arms.

WHAT YOU ARE DOING.

Your task for this activity will be to compare and contrast the locomotor strategies of the following three hominin species: Ardipithecus ramidus, Australopithecus afarensis and Homo erectus. You will accomplish this by answering the questions below

Use the following resource for Ardipithecus (Links to an external site.) (Click)

Use the following resource for Australopithecus (Links to an external site.) (Click)

Use the following resource for Homo erectus (Links to an external site.) (Click)

Before you begin make sure to view all unit material so that you can give me informed opinions.

WHAT YOU ARE DOING FOR POINTS.

1. Before you begin make sure view all relevant reading material so that you can give me informed opinions. 1. Which hominin had the best arboreal capabilities? Make sure you explain your answer by talking about only one feature that backs up your claim. Choose only one feature from the lower extremities (Legs and feet).2. Which hominin was the first to have feet that are effective for habitual bipedalism? Briefly explain what makes their feet more effective for bipedalism when compared to previous hominins.3. Which hominin had the best anatomy for running on two legs? Briefly explain how you would know and tell me about two specific skeletal features that suggest that your chosen species was running on two legs. 4. Lastly, I would like you to give a short summary of the notable evolutionary changes in locomotor strategy (the way that you move around) that you notice occur over time as seen from the perspective of Ardipithecus ramidus, Australopithecus afarensis and Homo erectus.

GRADING RUBRIC

Click on the “Gear icon” located in the top right-hand corner and then click on “Show Rubric” to view the grading requirements for this discussion.

TIPS FOR SUCCESS

• Please keep your answer to only what is asked in the assignment.
• I recommend composing your content offline in a text editor and then copy and paste the text into your reply post. If something happens you will have an offline copy of all of your hard work!
• I highly recommend using Google Docs (Drive) to compose offline, as Google plays well with web-based forums. If you are using Microsoft Word to compose offline, you may need to do some editing to the format when you paste it into the reply.

Rubric

From walking on two legs to running on two legs rubric

From walking on two legs to running on two legs rubric

Criteria	Ratings	Pts
This criterion is linked to a Learning OutcomeDescription of criterionCreate a summary of notable transformation that occur among hominins over time.	2.5 pts Full Marks Student gave informed summary of the locomotive changes that occur among hominins over time. 1.67 pts No Description Student gave an incomplete summary of the locomotive changes that occur among hominins over time. 0 pts No Marks Student made not attempt to give summary.	2.5 pts
This criterion is linked to a Learning OutcomeNo DescriptionExplore hominin that still retains significant arboreal capabilities	2 pts Full Marks Student correctly chose the species that retains a significant amount of arboreal capabilities. Student gave one feature that suggests that their chosen species had arboreal capabilities. 0.67 pts No Description Student correctly chose the species that retains a significant amount of arboreal capabilities but did not offer any explanations or did not focus on one feature 0 pts No Marks Student did not attempt any answer.	2 pts
This criterion is linked to a Learning OutcomeDescription of criterionExplore hominin to be first to be an obligate biped	2 pts Full Marks Student correctly chose the species that was the first to be an obligate biped. Student gave one specific anatomical feature form the lower extremities that suggests that their chosen species was an obligate biped. 1.33 pts No Description Student correctly chose the species that was the first to be an obligate biped. Student only gave general features that are found among all hominins but not one that suggests exclusive obligate bipedality. 0.67 pts No Description Student correctly chose the species that was the first to be an obligate biped but made no attempt to give an explanation 0 pts No Marks Student did not attempt to answer question.	2 pts
This criterion is linked to a Learning OutcomeNo Description	2 to >1.5 pts Full Marks Student correctly chose the hominin species that has effective bipedal running adaptations. Student gave one feature that assists in running. 1.5 to >0.5 pts No Description Student correctly chose the hominin species that has effective bipedal running adaptations but did not give an explanation as to why their chosen species is adapted to running. 0.5 to >0.0 pts No Description Student did not choose the correct species with running adaptations. 0 pts No Marks Student did not cite their information	2 pts
This criterion is linked to a Learning OutcomeNo DescriptionStudent will give citations	1.5 pts Full Marks Student cited their information 0.5 pts No Description Student partially cited their information 0 pts No Marks Student did not cite their information.	1.5 pts
Total Points: 10

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