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, Problem 7TYU
According to the punctuated equilibrium model, (a) populations slowly diverge from one another (b) the evolution of species occurs in spurts interspersed with long periods of stasis (c) evolutionary novelties originate from preadaptations (d) reproductive isolating mechanisms restrict gene flow between species (e) the fossil record, being incomplete, does not accurately reflect evolution as it actually occurred
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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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- When two populations are reproductively isolated, what else must occur for speciation to happen? (a) gene flow (b) genetic divergence (c) coevolution (d) convergent evolution (e) none of the abovearrow_forwardIn what way does the modern synthesis strengthen scientific understanding of evolution? (a) is based on the sequence of fossils in rock layers (b) uses genetics to explain the source of hereditary variation that is essentialto natural selection (c) was first proposed by ancient Greek scholars (d) considers the influence of the geographic distribution of organisms on their evolution (e) is reinforced by homologies that are explained by common descentarrow_forwardWhich of the following terms most specifically describes what occurs when a group of organisms expands to take on new ecological roles, forming new species and higher taxonomic groups in the process? (a) speciation (b) mass extinction (c) evolution (d) adaptive radiationarrow_forward
- Charles Darwin proposed that evolution could be explained by the differential reproductive success of organisms that resulted from their naturally occurring variation. Darwin called this process (a) coevolution (b) convergent evolution(c) natural selection (d) artificial selection (e) homoplasyarrow_forwardUsing examples, explain how FIVE of the following support the modern theory of evolution. (i) homologous structures (ii) analogous structures (iii) vestigal structures (iv) fossil record (v) biogeography (vi) embryology (vii) molecular biologyarrow_forwardNatural selection (a) leads to species being better adapted to their environment. (b) may lead to speciation if there is no gene flow between populations. (c) may lead to genetic divergence among populations in differing environments. (d) all of the above (e) none of the abovearrow_forward
- Which of the following CANNOT be learned by looking at phylogenetic trees? (A) ALL of these. (B) Which groups of species represent natural monophyletic groups (clades) that should be named. (C) Which ancestral nodes (representing extinct ancestors) might be older than other ancestral nodes. (D) Which extant species are older than other extant species. (E) Which characteristics most likely evolved along specific branches of the evolutionary tree.arrow_forwardWhich pattern of evolution is more likely to introduce homoplasies in the relationships between species?A) divergent evolutionB) parallel evolutionC) convergent evolutionarrow_forwardIn interpreting a cladogram, (a) we can identify the specific ancestor of each taxon by tracing each branch back to the node closest to the root (b) taxa on the right side of a cladogram have evolved from the taxa on the left side (c) the relative placement of smaller branches allows us to determine the number of years since a particular taxon has evolved (d) we can determine relationships by tracing along the branches back to the most recent commonancestor (e) we must first identify horizontal gene transferarrow_forward
- What characteristic(s) of the fossil record make(s) it strong support of evolution? a) It has fossils of many species in it that are not found on earth today. b) It is has a complete record of every form of life ever existing c) Species appear in sediment layers in a consistent pattern d) All fossils are similar to living forms found in the same area as the fossils Group of answer choices A. b and d B. a and b C. c and d D. a and c E. b and carrow_forwardWhich of the following statements is false regarding lateralgene transfer?(a) It accelerates evolution by allowing rapid acquisition ofadaptive traits.(b) It has resulted in multiple ancestral origins for some or-ganisms.(c) Laterally transfered genes are unstable and tend to belost over time.(d) Organisms in one domain have acquired genes from or-ganisms in a different domain.(e) It complicates the process of determining evolutionaryrelatedness.arrow_forwardYou are a scientist studying the relationships between lizards, penguins, and parrots. You examine the traits of each species and make the following character matrix: Таха Four Feathers Aquatic No body limbs temperature regulation Lizard 1 1 Penguin 1 1 1 Parrot 1 1 Based on this character matrix answer the following questions: a) The trait 'four limbs' is ancestral [ Select ] Feathers b) The most recent common ancestor of the three taxa ha v Four limbs c) 'Aquatic' is a(n) derived * trait.arrow_forward
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