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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

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Chapter
Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 25, Problem 6SQ
Textbook Problem
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Turtles, Lizards, and birds belong to one major lineage of amniotes, and ___ belong to another.

  1. a. sharks
  2. b. frogs and toads
  3. c. mammals
  4. d. salamanders

Summary Introduction

Concept introduction: The young ones that develop inside eggs of terrestrial animals require extra protection. Therefore, during the course of evolution of terrestrial animals, the eggs evolved to adapt to the terrestrial conditions. Aminote’s eggs have membranes within the egg. The function of this membrane is to enclose the fetus in a fluid-filled cavity and allow gaseous exchange, excretion, and nutrition.

Explanation of Solution

Reason for correct answer:

The amniotes evolved from an early amphibian ancestor. The amniotes evolved into two major lineages. One lineage includes external development of the fetus, and the other lineage has internal development. The turtles, lizards, and birds belong to the lineage that has external development. The mammals belong to a separate lineage that has internal development.

Option c. is given as “mammals” and since mammals do belong to a separate lineage of amniotes and not the one turtles, lizards, and birds belong to, the correct answer is option c.

Reasons for incorrect answer:

Option a...

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