Chapter 11. Chapter 11 Graphic Content

Introduction

Graphic Content
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You must read each slide, and complete the question on the slide, before proceeding to the next one.

Instructions

Review the information provided in the graph to answer each question below.

After submitting your answer, you will be provided feedback to check if your response is correct.

(This activity contains 5 questions.)

Question 11.1

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We are of the species Homo sapiens, which has Homo heidelbergensis as an ancestor, which may have Homo ergaster as an ancestor, which may have Homo habilis as an ancestor, which may have Australopithecus (gracile) as an ancestor, which may have Ardipithecus as an ancestor. We seem less likely to be direct descendants of Homo neanderthalensis and Australopithecus (robust), which are dead-end branches that split off from our common ancestors and became extinct.

Question 11.2

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Homo appeared about 2.5 million years ago. It seems to have had a significantly larger skull (and so brain size) than its Australopithecus ancestors.

Question 11.3

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The solid lines represent transitions from one species to another that are better supported by fossils showing gradual changes. The dashed lines represent potential relationships that are not as well supported by transitional fossils. But the discovery of additional fossils may enable better clarification of the relationships.

Question 11.4

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About 1.6 million years ago, there were probably four different human species living at the same time: Australopithecus (robust), Homo erectus, Homo ergaster, and Homo habilis.

Question 11.5

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It’s not long ago that our species became the only living representative of the genus Homo. From this figure, it appears to be approximately 10,000 years ago.

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