Ardi (Ardipithecus ramidus) lived 4.4 million years ago, close to the time that our lineage diverged from chimpanzees suggesting that Ardi might be more similar to the last common ancestor than extant chimpanzees or humans. Ardi has small teeth like ours, indicative of a generalized diet. So small teeth are older than larger teeth of extant chimpanzees! Ardi also had limbs shaped more like ours than chimpanzees’. Ardi’s skull also shares other features with ours – for example, it is relatively narrow. The hypothesis we tested assumed that the hominin ancestor resembled chimpanzees, and the assumption was quite common among paleoanthropologists until recently (Lovejoy, 2009).Considering both these data about Ardi and the data that you took, revise your hypothesis. (1 point) Explain chimpanzee skull and/or skeletal development, in terms of regulatory genes (specifically, timing), in light of your new hypothesis. (0.5 points) Explain Homo sapiens skull and/or skeletal development, in terms of regulatory genes (specifically, timing), in light of your new hypothesis. (0.5 points)

1. The implied human predecessor nicknamed Ardi and revealed to the world last October was not the…

Answered: Ardi (Ardipithecus ramidus) lived 4.4…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Ardi (Ardipithecus ramidus) lived 4.4 million years ago, close to the time that our lineage diverged from chimpanzees suggesting that Ardi might be more similar to the last common ancestor than extant chimpanzees or humans. Ardi has small teeth like ours, indicative of a generalized diet. So small teeth are older than larger teeth of extant chimpanzees! Ardi also had limbs shaped more like ours than chimpanzees’. Ardi’s skull also shares other features with ours – for example, it is relatively narrow. The hypothesis we tested assumed that the hominin ancestor resembled chimpanzees, and the assumption was quite common among paleoanthropologists until recently (Lovejoy, 2009).

Considering both these data about Ardi and the data that you took, revise your hypothesis. (1 point)
Explain chimpanzee skull and/or skeletal development, in terms of regulatory genes (specifically, timing), in light of your new hypothesis. (0.5 points)

Explain Homo sapiens skull and/or skeletal development, in terms of regulatory genes (specifically, timing), in light of your new hypothesis. (0.5 points)

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