Biology: The Unity and Diversity of Life (MindTap Course List)
Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 48, Problem 1SQ
Summary Introduction

To explain: Whether the statement “Most species that evolved have already become extinct” is true or false.

Introduction: Extinction is a process of termination of one species or group of species. The species formed get extinct on an ongoing basis.

Expert Solution & Answer
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Answer to Problem 1SQ

Correct answer: The given statement “Most species that evolved have already become extinct” is true.

Explanation of Solution

New species evolve from the older ones. More than 90 percentage of existing species are now extinct. For example, evolved dinosaurs have already become extinct. During the Triassic period, ancestors of dinosaur were evolved from amphibian species. During the Jurassic period, dinosaur’s number increased and by the Cretaceous period, different verities of dinosaurs were evolved. However, during the end of Cretaceous period and beginning of the tertiary period, they become extinct. Thus, the statement is true.

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Would it be possible to bring extinct species back? In an article it was expressed how brinng extinct species back is still very futuristic, and we should aim at a smaller creature. Using a smaller sized species like the Christmas rat can set up scientists for potentially larger species. There is a major issue that comes up and that is incomplete genes. It makes it difficult to even compare modern day rat to the Christmas rats' genome because their genes are specialized and as more time passes, the harder it is to have a match. The article also talked about using modern day elephants to make a woolly elephant, meaning they don't want a perfect match. Rather, scientists want to make hybrids since it could be more realistic.
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