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Question 6

Question 6

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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Question 6
**Evolution and Adaptation: Understanding Theories** In the study of evolution, various hypotheses have been proposed to explain how specific traits, such as the long necks in giraffes, have developed over time. Here are a couple of questions to help deepen your understanding of evolutionary theories: --- **Question 6:** **Bob believes that giraffes have long necks because they have been forced to stretch their necks to reach food that is high in trees, therefore they acquired long necks. Early generations of giraffes passed the long neck gene to their offspring. Whose theory of evolution is Bob’s belief consistent with?** A. Darwin B. Lamarck --- **Question 7:** **Sarah believes that giraffes have long necks because those with long necks were able to reach food, whereas those with short necks could not, leading to the survival and reproduction of the long-necked giraffes.** (Note: The end of Question 7 is not fully visible in the image provided.) --- These questions illustrate two significant theories in the context of evolution: 1. **Lamarckian Evolution (A)**: As detailed in Bob's belief, this theory suggests that traits acquired during an organism's lifetime, such as a giraffe stretching its neck to reach food, can be passed down to its offspring. This implies that the use or disuse of physical features can lead to evolutionary change over successive generations. 2. **Darwinian Evolution (B)**: As inferred from Sarah's belief, this theory emphasizes natural selection. It suggests that traits which confer a survival advantage, like longer necks for reaching food, become more common in the population as they are passed down to successive generations. Those with advantageous traits are more likely to survive and reproduce, perpetuating the trait. By examining these theories, students can better comprehend the mechanisms that drive evolutionary changes and the historical context of these scientific concepts.
Transcribed Image Text:**Evolution and Adaptation: Understanding Theories** In the study of evolution, various hypotheses have been proposed to explain how specific traits, such as the long necks in giraffes, have developed over time. Here are a couple of questions to help deepen your understanding of evolutionary theories: --- **Question 6:** **Bob believes that giraffes have long necks because they have been forced to stretch their necks to reach food that is high in trees, therefore they acquired long necks. Early generations of giraffes passed the long neck gene to their offspring. Whose theory of evolution is Bob’s belief consistent with?** A. Darwin B. Lamarck --- **Question 7:** **Sarah believes that giraffes have long necks because those with long necks were able to reach food, whereas those with short necks could not, leading to the survival and reproduction of the long-necked giraffes.** (Note: The end of Question 7 is not fully visible in the image provided.) --- These questions illustrate two significant theories in the context of evolution: 1. **Lamarckian Evolution (A)**: As detailed in Bob's belief, this theory suggests that traits acquired during an organism's lifetime, such as a giraffe stretching its neck to reach food, can be passed down to its offspring. This implies that the use or disuse of physical features can lead to evolutionary change over successive generations. 2. **Darwinian Evolution (B)**: As inferred from Sarah's belief, this theory emphasizes natural selection. It suggests that traits which confer a survival advantage, like longer necks for reaching food, become more common in the population as they are passed down to successive generations. Those with advantageous traits are more likely to survive and reproduce, perpetuating the trait. By examining these theories, students can better comprehend the mechanisms that drive evolutionary changes and the historical context of these scientific concepts.
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