Biology 12th Edition

Published by McGraw-Hill Education
ISBN 10: 0078024269
ISBN 13: 978-0-07802-426-9

Chapter 28 - Invertebrate Evolution - Engage - Thinking Scientifically - Page 543: 1

Answer

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The evolution of multicellularity provided animals with several advantages over their single-celled relatives, including: Larger size: Multicellular animals can grow much larger than single-celled organisms. This increased size provides several advantages, such as the ability to hunt or defend against predators more effectively and to explore new environments. Specialization of cells: Multicellularity allows for the specialization of cells, with different cells performing different functions within the organism. This specialization allows for more efficient nutrient uptake, waste removal, and other physiological processes. Division of labor: With the specialization of cells, multicellular organisms can divide labor between different cells, leading to more efficient and effective functioning. This allows the organism to perform tasks that would be impossible for single-celled organisms. Increased complexity: Multicellularity allows for the development of complex body plans and structures, such as organs, tissues, and organ systems. This complexity allows for more sophisticated physiological processes and the development of specialized functions, such as sight, hearing, and smell. Adaptation to diverse environments: Multicellularity allows organisms to adapt to diverse environments more effectively. This is because the organism can develop specialized structures and behaviors that are better suited to its specific environment. Overall, the advantages of multicellularity allowed animals to develop more complex and sophisticated physiological processes, leading to increased survivability and competitiveness in a wide range of environments.
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