Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 23, Problem 4TYU
A genetic change that caused a certain Hox gene to be expressed along the tip of a vertebrate limb bud instead of farther back helped make possible the evolution of the tetrapod limb. This type of change is illustrative of
- A. the influence of environment on development.
- B. paedomorphosis.
- C. a change in a developmental gene or in its regulation that altered the spatial organization of body parts
- D. heterochrony.
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Chapter 23 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 23.1 - Your measurements indicate that a fossilized skull...Ch. 23.1 - Describe an example from the fossil record that...Ch. 23.1 - WHAT IF? What might a fossil record of life today...Ch. 23.1 - Prob. 4CCCh. 23.2 - Explain the consequences of plate tectonics for...Ch. 23.2 - Prob. 2CCCh. 23.2 - What factors promote adaptive radiations?Ch. 23.2 - Prob. 4CCCh. 23.3 - Explain how new body forms can originate by...Ch. 23.3 - Why is it likely that Hox genes have played a...
Ch. 23.3 - MAKE CONNECTIONS Given that changes in morphology...Ch. 23.4 - How can the Darwinian concept of descent with...Ch. 23.4 - Prob. 2CCCh. 23 - Which factor most likely caused animals and plants...Ch. 23 - Adaptive radiations can be a direct consequence of...Ch. 23 - A researcher discovers a fossil of what appears to...Ch. 23 - A genetic change that caused a certain Hox gene to...Ch. 23 - A swim bladder is a gas-filled sac that helps fish...Ch. 23 - SCIENTIFIC INQUIRY Herbivory (plant eating) has...Ch. 23 - FOCUS ON EVOLUTION Describe how gene flow, genetic...Ch. 23 - FOCUS ON ORGANIZATION You have seen many examples...Ch. 23 - SYNTHESIZE YOUR KNOWLEDGE In 2010, the Soufriere...
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- The Brachyury and Tbx5 in vertebrates and the Ap3 gene in flowering plants a. are examples of Hox genes. b. are examples of co-opting a gene for a new function. c. are homologues for determining the body plan of eukaryotes. d. help regulate the formation of appendages.arrow_forwardWhich of the following is the correct order for the four developmental phases in animals? A. Segmentation of the body B. Determination C. Cell differentiation D. Formation of body axes a. A, B, C, D b. A, D, C, B c. D, A, B, C d. D, A, C, Barrow_forwardWhich of the following statements is FALSE? a. Only vertebrates possess HOX genes. b. HOX genes are transcription factors. c. Hox genes are very highly conserved in the genome location and function among organims. d. HOX genes are activated in a very predictable pattern.arrow_forward
- The bones in the front fins of whales and the bones in the human arm evolved from a common ancestor but carry out different functions. This is an example of A. homologous structures. B. vestigial structures. C. analogous structures. D. embryonic structures.arrow_forwardCharacteristics that evolved in birds to allow for flight includea. reptilian-like scales on the legs.b. a hard-shelled amniotic egg.c. internal fertilization.d. thin, hollow bones in the skeleton.arrow_forwardUsing the following list, describe the proper sequence for the events of animal development: 1. Tissues, organs, and other body structures in each segment are formed. 2. Axes of the entire animal are determined. 3. Cells become differentiated. 4. The entire animal is divided into segments. a. 2, 3, 4, 1 b. 1, 2, 4, 3 c. 2, 4, 3, 1 d. 3, 2, 4, 1 e. 2, 4, 1, 3arrow_forward
- In animals, Hox genes activate proteins to determine A. animal cephalic region B. animal physiology C. animal body plan D. animal caudal region E. animal reproductionarrow_forwardwhich of the following a correct development sequence a. Neural plate, proliferation, neural groove, neural tube b. Neural plate, neural groove , neural tube, proliferation c. Neural groove, neural tube, proliferation, neural plate d. Proliferation, neural plate, neural groove , neural tubearrow_forwardDevelopment of an animal is controlled by the genes that are expressed during development. What roles have been proposed for Hox genes in the evolution and morphology of animal species? Group of answer choices 1. Variation in the Hox genes may have spawned the formation of many new body plans. 2. All of these descriptions are correct. 3. The number and arrangement of Hox genes varies among different types of animals. 4. Increases in the number of Hox genes may have led to greater complexity in body structure.arrow_forward
- Which of the following is NOT a derived trait in primates? A. Claws B. Opposable fingers/toes C. Postorbital bar/plate D. Trichromacyarrow_forwardWhich of the following is a derived trait of vertebrates? A. Dorsal hollow nerve cord B. A mineralized (i.e. bony) skeleton C. Skull and vertebrae D. Jaws E. All of the abovearrow_forwardMammals belong to a group of amniotes known as synapsids. Three major lineages of mammals had emerged by the early Cretaceous period. In a tabulated form, compare these three lineages to illustrate their diversity in terms of: a. Embryonic developmen, b. How the young are fed and c. Period of gestationarrow_forward
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