Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 31, Problem 17TYU
Summary Introduction
To explain: The way in which the exceptions in animal body plan that generally evolved from simple form to complex form.
Introduction: Animal phylogeny is the rapidly changing field for the biologists. Members of the animal kingdom are incredibly diverse. There are various animals sharing certain features that differentiate them from other organisms of the kingdom.
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Students have asked these similar questions
The evolution of different body plans in animals has led to a wide diversity of species. For example,
in Cnidaria (which includes jellyfish and corals) we see a radically different body plan compared to
insects or birds. What significant evolutionary development is exhibited by insects and birds that is
not present in Cnidaria?
The development of bilateral symmetry and cephalization.
The development of radial symmetry.
The development of a calcified exoskeleton.
The development of tentacles for capturing prey.
Looking at the present, the evolutionary relationships between extant species can be seen in the presence of body parts sharing a common basic design. These structures are descended from a common ancestor. Sometimes, structures which no longer serve their original function are found in modern species. What is this structure?
Discuss the idea that every evolutionary adaptation has both advantages and disadvantages, using each of the following as an example: (a) cephalization,(b) the arthropod exoskeleton, and (c) segmentation with specialization.
Chapter 31 Solutions
Biology (MindTap Course List)
Ch. 31.1 - Prob. 1LOCh. 31.1 - Prob. 2LOCh. 31.1 - Prob. 3LOCh. 31.1 - connect What is the significance of choanocytes in...Ch. 31.1 - Prob. 2CCh. 31.1 - VISUALIZE Sketch the major events of the life...Ch. 31.1 - Prob. 4CCh. 31.2 - Prob. 4LOCh. 31.2 - Prob. 5LOCh. 31.2 - Prob. 6LO
Ch. 31.2 - Prob. 7LOCh. 31.2 - Prob. 8LOCh. 31.2 - What are some advantages of cephalization and a...Ch. 31.2 - On what basis have biologists classified...Ch. 31.2 - Prob. 3CCh. 31.2 - Prob. 4CCh. 31.3 - Prob. 9LOCh. 31.3 - Prob. 10LOCh. 31.3 - Describe six key characteristics of arthropods,...Ch. 31.3 - Prob. 12LOCh. 31.3 - Prob. 1CCh. 31.3 - Describe four key arthropod characteristics, and...Ch. 31.3 - Prob. 3CCh. 31.3 - Describe four adaptations that have contributed to...Ch. 31 - Prob. 1TYUCh. 31 - Prob. 2TYUCh. 31 - Which of the following is associated with the...Ch. 31 - Trochophore larvae are characteristic of (a)...Ch. 31 - Prob. 5TYUCh. 31 - An open circulatory system (a) is characteristic...Ch. 31 - Which of the following characteristics is...Ch. 31 - Trilobites (a) were early mollusks (b) are...Ch. 31 - Prob. 9TYUCh. 31 - Prob. 10TYUCh. 31 - The correct sequence of complete metamorphosis of...Ch. 31 - Test Your Understanding 12. VISUALIZE Draw a cross...Ch. 31 - Prob. 13TYUCh. 31 - Prob. 14TYUCh. 31 - INTERPRET DATA Imagine that you discover a new...Ch. 31 - Prob. 16TYUCh. 31 - Prob. 17TYUCh. 31 - Prob. 18TYUCh. 31 - SCIENCE, TECHNOLOGY, AND SOCIETY international...
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- Based on phylogeny and history of evolution, do new anatomical features such as lungs (amphibians) arise de novo or came from pre-existing structures of their ancestors (like gills of fish)? Explain.arrow_forwardMorphology - Comparative Anatomy More evidence for evolution is offered by comparing the anatomy, or body parts, of different organisms. Many animals have body parts that are similar in both structure and function called homologous structures. The forelimbs of animals like humans, whales, birds, and other creatures are strikingly similar even though the forelimbs are used for different purposes such as lifting objects, swimming, or flying. The different changes in the forelimbs are adaptations to the needs of the organisms. Darwin also observed that animals have structures that they do not use, which are called vestigial organs. These are structures that an organism has that do not have a function, though they may have had one in the past. In humans they include the appendix, the fused tail vertebrae, and Humerus wisdom teeth. Perhaps an environmental change made the organ unnecessary for survival, and the organ gradually becomes Radius Ulna Carpals nonfunctional. For instance, the…arrow_forwardWhich of the following pieces of evidence would best support the argument that humans are more evolutionarily related to fish than they are to insects? All these organisms require oxygen to survive. The earliest fish fossils are found in the lowest strata of sedimentary rocks, followed by insects, and then humans. The early stages of embryo development in fish and humans look strikingly similar while insects develop very differently compared to both fish and humans. Fossils of ancient fish and human ancestors have been discovered in the same sedimentary rock layers.arrow_forward
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