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 20.4, Problem 5LO
Summary Introduction
To explain: The pace of evolution by describing punctuated equilibrium and phyletic gradualism.
Introduction: Inheritance is the basis of evolution. The process of formation of new and distinct descendants from a common ancestor is termed as
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Discuss the pace of evolution by describing punctuated equilibriumand phyletic gradualism.
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Chapter 20 Solutions
Biology (MindTap Course List)
Ch. 20.1 - Describe the biological species concept and list...Ch. 20.1 - Prob. 1CCh. 20.1 - Prob. 2CCh. 20.1 - Prob. 3CCh. 20.2 - Explain the significance of reproductive isolating...Ch. 20.2 - What barriers prevent wood frogs and leopard frogs...Ch. 20.2 - How is temporal isolation different from...Ch. 20.2 - Prob. 3CCh. 20.2 - Of which postzygotic barrier is the mule an...Ch. 20.3 - Prob. 3LO
Ch. 20.3 - Explain the mechanisms of sympatric speciation and...Ch. 20.3 - What are five geographic barriers that might lead...Ch. 20.3 - Prob. 2CCh. 20.3 - Prob. 3CCh. 20.4 - Prob. 5LOCh. 20.4 - Prob. 1CCh. 20.5 - Define macroevolution.Ch. 20.5 - Discuss macroevolution in the context of novel...Ch. 20.5 - Prob. 8LOCh. 20.5 - Why are evolutionary novelties important to...Ch. 20.5 - Prob. 2CCh. 20.5 - Prob. 3CCh. 20.5 - What is the relationship between mass extinction...Ch. 20 - A prezygotic barrier prevents (a) the union of egg...Ch. 20 - The reproductive isolating mechanism in which two...Ch. 20 - Interspecific hybrids, if they survive, are (a)...Ch. 20 - The first step leading to allopatric speciation is...Ch. 20 - The pupfishes in the Death Valley region are an...Ch. 20 - Which of the following evolutionary processes is...Ch. 20 - According to the punctuated equilibrium model, (a)...Ch. 20 - The evolutionary conversion of reptilian scales...Ch. 20 - Adaptive radiation is common following a period of...Ch. 20 - The Hawaiian silverswords are an excellent example...Ch. 20 - VISUALIZE Use two different colors to depict the...Ch. 20 - Prob. 12TYUCh. 20 - EVOLUTION LINK Could hawthorn and apple maggot...Ch. 20 - Prob. 14TYUCh. 20 - EVOLUTION LINK Examine Figure 20-2c and predict...
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- Contrast the gradualistic model of evolution with the punctuated equilibrium model of evolution.arrow_forwardDefine the following terms: divergent evolution, convergent evolution, analogous structures, homologous structuresarrow_forwardExamine the following phylogenetic tree illustrated in Figure shown in the first picture. In general, what does a phylogenetic tree illustrate? How do you compare the relationships of organisms BB, CC, and DD? Given the following organisms in the Table in the second picture, number them in terms of which is relatively closest and distant. Number 1 refers to closest.arrow_forward
- Phylogeny refers to the evolutionary descent of taxa. It refers to the relationship between ancestors and descendants and relationships among descendant taxa. It shows the lineage of taxa which can be summarized in a branching diagram called a phylogenetic tree.1. Express some basic evolutionary relationships among groups of microorganisms, plants, and animals; 2. Illustrate the relationship of organisms with their environment; and 3. Analyze environmental factors contributing to biodiversity richness and lossarrow_forwardDraw a phylogenythat accurately portrays the evolutionary relationships among the organisms listed. Each organism listed should be at the tip of a branch on the tree. Use the internet to discover what type of organisms they are, and refer to the textbook and course notes as you determine the relationships among these organisms. Label the phylogeny with each of the 6 species listed and write on the tree where the following derived traits evolved: specialized tissues, radial symmetry, bilateral symmetry, deuterostomy, protostomy, and ecdysozoan cuticle (the need for an animal to molt in order to grow). Anthopleura xanthogrammica Giant Green Anemone Chondrocladia lyra. harp sponge Diadema antillarum black sea urchin Euphasia superba. Antarctic krill Phrynosoma cornutum. horny toad Taenia saginata. beef tapewormarrow_forwardPhylogenetic trees are diagrams used to reflect evolutionary relationships among organisms or groups of organisms. _______ trees have a single ancestral line to which all organisms in the diagram relate to. ______ do not have a common ancestor but do show relationships among species.arrow_forward
- Define the term unikont and explain the current taxonomic interpretation of where unikonts arose on the phylogenetic tree of lifearrow_forwardDistinguish between convergent and divergent evolution giving one example of each.arrow_forwardWhich of the following represents the most closely related group of organisms in the phylogeny shown above? A C E F Garrow_forward
- Below is an example of a particular kind of phylogenetic tree called a chronogram. Chronoograms are named because the length of the branches represents different lengths of time. Nodes are represented by vertical lines, and branches with horizontal ones. They can be arranged horizontally, with the most recent evolutions on the right. Given this information, the taxa that is most closely related to Dubautia ciliolata c. 529 (highlighted below) is _________________ (make sure to type exactly the same characters, including the numbers; do not italicize).arrow_forwardIn the figure, the letters A-G represent individual species that all descended from a common ancestor. DEFG Which of the following conclusions regarding the phylogeny of these organisms can be made from this tree? B is more closely related to G than it is to A. A is more closely related to D than it is to C. G is more closely related to A than it is to F. D is more closely related to E than it is to C.arrow_forwardShows how modern organisms descended from common ancestors Structures that do not serve a function and are similar to those found in earlier organisms 1. Transitional Species Compares the age of fossils to each other based on the layers of rock they are found in 2. Vestigial structure 3. Fossil Record 4. Relative Dating Evidence of gradual change between a new species and its ancestor 5. Radiometric Dating Structures that related species have inherited from a common ancestor 6. Homologous Structures uses radioactive elements to narrow down the age of a fossil to a specific periodarrow_forward
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