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Work in a small group or alone to complete this exercise. In this lab, we discussed homologous traits. In addition to specific traits that reflect common ancestry, there are also general traits (such as the basic organization and layout of body parts) that reflect shared ancestry. These general similarities due to common ancestry are called homologous structures. In this exercise, you will examine homologous structures in the limbs of several different animals. 1. Examine the limb specimens provided by your instructor (or the images in the Lab 9 Exercise Image Library on p.276) and complete the chart below. 。 For bone length, indicate whether you think the animal's limb bones are relatively long, short, or intermediate for its overall body size. Use the drawings of the complete animals and shading of the bone elements as a guide. (For example, a kangaroo would be described as having long legs for its body.) For bone robusticity, indicate whether you think the animal's bones are robust (heavy and dense), gracile (lightweight and slender), or intermediate. Animal Bone Length Bone Robusticity Frog Dog Bird Pig 2. What do you notice is generally similar across all the specimens? Bird Pig 2. What do you notice is generally similar across all the specimens? 3. What do you notice is generally different across the specimens? 4. How do these similarities and differences relate to the evolutionary relationships between these species? 5. What similarities and differences in adaptation (for example, different locomotor needs or different weight-bearing needs) may also relate to the similarities and differences you see across these specimens?

Work in a small group or alone to complete this exercise. In this lab, we discussed homologous traits. In addition to specific traits that reflect common ancestry, there are also general traits (such as the basic organization and layout of body parts) that reflect shared ancestry. These general similarities due to common ancestry are called homologous structures. In this exercise, you will examine homologous structures in the limbs of several different animals. 1. Examine the limb specimens provided by your instructor (or the images in the Lab 9 Exercise Image Library on p.276) and complete the chart below. 。 For bone length, indicate whether you think the animal's limb bones are relatively long, short, or intermediate for its overall body size. Use the drawings of the complete animals and shading of the bone elements as a guide. (For example, a kangaroo would be described as having long legs for its body.) For bone robusticity, indicate whether you think the animal's bones are robust (heavy and dense), gracile (lightweight and slender), or intermediate. Animal Bone Length Bone Robusticity Frog Dog Bird Pig 2. What do you notice is generally similar across all the specimens? Bird Pig 2. What do you notice is generally similar across all the specimens? 3. What do you notice is generally different across the specimens? 4. How do these similarities and differences relate to the evolutionary relationships between these species? 5. What similarities and differences in adaptation (for example, different locomotor needs or different weight-bearing needs) may also relate to the similarities and differences you see across these specimens?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Work in a small group or alone to complete this exercise. In this lab, we discussed homologous traits. In addition to specific traits that reflect common ancestry, there are also general traits (such as the basic organization and layout of body parts) that reflect shared ancestry. These general similarities due to common ancestry are called homologous structures. In this exercise, you will examine homologous structures in the limbs of several different animals. 1. Examine the limb specimens provided by your instructor (or the images in the Lab 9 Exercise Image Library on p.276) and complete the chart below. 。 For bone length, indicate whether you think the animal's limb bones are relatively long, short, or intermediate for its overall body size. Use the drawings of the complete animals and shading of the bone elements as a guide. (For example, a kangaroo would be described as having long legs for its body.) For bone robusticity, indicate whether you think the animal's bones are robust (heavy and dense), gracile (lightweight and slender), or intermediate. Animal Bone Length Bone Robusticity Frog Dog Bird Pig 2. What do you notice is generally similar across all the specimens?
Transcribed Image Text:Work in a small group or alone to complete this exercise. In this lab, we discussed homologous traits. In addition to specific traits that reflect common ancestry, there are also general traits (such as the basic organization and layout of body parts) that reflect shared ancestry. These general similarities due to common ancestry are called homologous structures. In this exercise, you will examine homologous structures in the limbs of several different animals. 1. Examine the limb specimens provided by your instructor (or the images in the Lab 9 Exercise Image Library on p.276) and complete the chart below. 。 For bone length, indicate whether you think the animal's limb bones are relatively long, short, or intermediate for its overall body size. Use the drawings of the complete animals and shading of the bone elements as a guide. (For example, a kangaroo would be described as having long legs for its body.) For bone robusticity, indicate whether you think the animal's bones are robust (heavy and dense), gracile (lightweight and slender), or intermediate. Animal Bone Length Bone Robusticity Frog Dog Bird Pig 2. What do you notice is generally similar across all the specimens?
Bird Pig 2. What do you notice is generally similar across all the specimens? 3. What do you notice is generally different across the specimens? 4. How do these similarities and differences relate to the evolutionary relationships between these species? 5. What similarities and differences in adaptation (for example, different locomotor needs or different weight-bearing needs) may also relate to the similarities and differences you see across these specimens?
Transcribed Image Text:Bird Pig 2. What do you notice is generally similar across all the specimens? 3. What do you notice is generally different across the specimens? 4. How do these similarities and differences relate to the evolutionary relationships between these species? 5. What similarities and differences in adaptation (for example, different locomotor needs or different weight-bearing needs) may also relate to the similarities and differences you see across these specimens?
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