Biology Illinois Edition (Glencoe Science)
7th Edition
ISBN: 9780078759864
Author: Alton Biggs
Publisher: MCG
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Chapter 16, Problem 6STP
Summary Introduction
Introduction:
Hominins are a subgroup of the hominoids and has evolved in response to climate changes of the Miocene. The oldest known hominoid fossil is from the genus Proconsul . It is considered to be the human ancestor. The hominins include humans and all their extinct relatives. Homo sapiens have evolved from hominoids.
Expert Solution & Answer
Answer to Problem 6STP
Correct answer :
The correct answer is option D. Proconsul->Australopithecus afarensis->Australopithecus africanus->Homo
Explanation of Solution
Explanation/justification for the correct answer:
Option D. Proconsul->Australopithecus afarensis->Australopithecus africanus->Homo − The first hominins that were truly bipedal were the australopithecines. Lucy is one of the complete australopithecine fossils ever found. She was a member of species A.afarensis which lived between 4 and 2.9 mya. The first australopithecine fossils found was the “Taung baby” in Africa. It was a member of species A.africanus and lived between 3.3 and 2.3 mya. So the correct sequence of hominin evolution is Proconsul->Australopithecus afarensis->Australopithecus africanus->Homo.
Hence this is the correct option.
Explanation for incorrect answer:
Option A. Australopithecus afarensis->Australopithecus africanus->Proconsul->Homo -The oldest known hominoid fossil is from the genus Proconsul . It is considered to be the human ancestor. The australopithecines came after the Proconsul . Hence this is not the correct option.
Option B. Australopithecus africanus->Australopithecus afarensis->Proconsul->Homo - The australopithecines came much later than the Proconsul . Hence this is not the correct option.
Option C. Homo->Australopithecus africanus ->Australopithecus afarensis ->Proconsul − The Homo sapiens have evolved from the australopithecines. The oldest known hominoid fossil is from the genus Proconsul . Hence this is not the correct option.
Chapter 16 Solutions
Biology Illinois Edition (Glencoe Science)
Ch. 16 - Prob. 1ACh. 16 - Prob. 2ACh. 16 - Prob. 3ACh. 16 - Prob. 4ACh. 16 - Prob. 5ACh. 16 - Prob. 6ACh. 16 - Prob. 7ACh. 16 - Prob. 8ACh. 16 - Prob. 9ACh. 16 - Prob. 10A
Ch. 16 - Prob. 11ACh. 16 - Prob. 12ACh. 16 - Prob. 13ACh. 16 - Prob. 14ACh. 16 - Prob. 15ACh. 16 - Prob. 16ACh. 16 - Prob. 17ACh. 16 - Prob. 18ACh. 16 - Prob. 19ACh. 16 - Prob. 20ACh. 16 - Prob. 21ACh. 16 - Prob. 22ACh. 16 - Prob. 23ACh. 16 - Prob. 24ACh. 16 - Prob. 25ACh. 16 - Prob. 26ACh. 16 - Prob. 27ACh. 16 - Prob. 28ACh. 16 - Prob. 29ACh. 16 - Prob. 30ACh. 16 - Prob. 31ACh. 16 - Prob. 32ACh. 16 - Prob. 33ACh. 16 - Prob. 34ACh. 16 - Prob. 35ACh. 16 - Prob. 36ACh. 16 - Prob. 37ACh. 16 - Prob. 38ACh. 16 - Prob. 39ACh. 16 - Prob. 40ACh. 16 - Prob. 41ACh. 16 - Prob. 42ACh. 16 - Prob. 43ACh. 16 - Prob. 1STPCh. 16 - Prob. 2STPCh. 16 - Prob. 3STPCh. 16 - Prob. 4STPCh. 16 - Prob. 5STPCh. 16 - Prob. 6STPCh. 16 - Prob. 7STPCh. 16 - Prob. 8STPCh. 16 - Prob. 9STPCh. 16 - Prob. 10STPCh. 16 - Prob. 11STPCh. 16 - Prob. 12STPCh. 16 - Prob. 13STPCh. 16 - Prob. 14STPCh. 16 - Prob. 15STP
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