Briefly discuss the three different paths of hominin evolution. Describe each path separately by discussing where it was happening and how the evolving species are marked by the four hominin evolutionary trends (make sure you name as many species as you can).

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Tod ThielLv2

14 Mar 2018

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What you have to do:

Your task for this activity will be to compare and contrast thelocomotor strategies of the following three hominin species:Ardipithecus ramidus, Australopithecus afarensis and Homo erectus.You will accomplish this by answering the following questions.Before you begin make sure view all relevant reading material sothat you can give me informed opinions.

1. Which hominin had the best arboreal capabilities? Make sureyou explain your answer by talking about only one feature thatbacks up your claim. Choose only one feature from the lowerextremities (Legs and feet).

2. Which hominin was the first to have feet that are effectivefor habitual bipedalism? Briefly explain what makes their feet moreeffective 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 specificskeletal features that suggest that your chosen species was runningon two legs.

4. Lastly, I would like you to give a short summary of thenotable evolutionary changes in locomotor strategy (the way thatyou move around) that you notice occur over time among thesespecies Ardipithecus ramidus, Australopithecus afarensis and Homoerectus.

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Evolution and Speciation

Define evolution. Why is it inaccurate for creationists to tout evolution as âjust a theoryâ? (Think about what theory actually means in scientific terms vs. the use of the word âtheoryâ in casual conversations).

Explain what the Hardy-Weinberg equilibrium shows and describe the conditions necessary for the equilibrium to be maintained.

Explain what factors cause populations to diverge from the Hardy- Weinberg equilibrium and how each factor causes the change.

Describe how species evolve via natural selection. (Be sure to discuss the key aspects of natural selection: variation, heredity differential survival and reproductive success in your answer).

What does speciation mean and how can it occur?

What does adaptation mean? Why is natural selection the only agent of evolutionary change that leads to adaptation? (Think about how natural selection works).

Is natural selection all powerful? Can it create any variation that you or I could think of? Why or why not?

Differentiate between natural and sexual selection.

What is reproductive isolation?

Describe prezygotic and postzygotic mechanisms of reproductive isolation and explain how they can contribute to speciation.

Distinguish between allopatric and sympatric speciation and explain how each leads to new species.

What is adaptive radiation?

Be able to read and interpret phylogenetic trees: be able to determine which species are most closely related to each other, what nodes represent, where common ancestors would be located, etc.

What are paraphyletic, polyphyletic and monophyletic groups within a phylogeny?

viridianmanatee515

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