CH 9: Lamarckism Theory
46 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What led to the rejection of Lamarck's theories?

  • Introduction of natural selection by Charles Darwin
  • Discovery of genetics and Gregor Mendel's work (correct)
  • Integration of genetics with Darwin's natural selection
  • Lack of empirical support and predictive power

    • How did Lamarck's theory differ from Charles Darwin's natural selection?

  • Lamarck proposed purposeful adaptation, Darwin proposed random selection (correct)
  • Lamarck believed in static life forms, Darwin believed in evolving organisms
  • Lamarck supported genetic mutation, Darwin supported direct environmental influence
  • Lamarck focused on genetic inheritance, Darwin focused on acquired traits

    • What did Lamarck misunderstand about genetic information transmission?

  • He considered scars and muscle strength as DNA-altering factors
  • He thought genetic information is not passed through genes
  • He overlooked the role of environment in gene alteration
  • He believed acquired traits could be inherited (correct)

    • Why did Lamarck's theories lack predictive power?

    <p>They lacked empirical support</p> Signup and view all the answers

    How did modern evolutionary biology integrate genetics and natural selection?

    <p>By combining genetic inheritance with advantageous traits through natural selection</p> Signup and view all the answers

    According to Lamarck's theory, what would happen to a structure if an organism frequently used it?

    <p>The structure would become more developed over time</p> Signup and view all the answers

    What was the basis of Lamarck's 'Law' of Use and Disuse?

    <p>Physiological changes acquired over an organism's lifetime could influence its evolutionary path</p> Signup and view all the answers

    In Lamarck's theory, what would happen to a structure that an organism did not use?

    <p>The structure would become less significant over generations</p> Signup and view all the answers

    What did Lamarck believe about the inheritance of acquired characteristics?

    <p>Changes acquired during an organism's lifetime could be inherited by offspring</p> Signup and view all the answers

    Why did Lamarck propose that giraffes developed long necks?

    <p>Due to stretching of their ancestors' necks to reach higher leaves</p> Signup and view all the answers

    Why were Lamarck's theories rejected in favor of Mendel's genetics?

    <p>Genetic information is not altered by an individual's lifestyle or changes during their lifetime.</p> Signup and view all the answers

    How did Lamarck's theories differ from Darwin's natural selection regarding trait development?

    <p>Lamarck believed in purposeful adaptation, while Darwin proposed random selection of advantageous traits.</p> Signup and view all the answers

    What was one of Lamarck's main misconceptions regarding genetic inheritance?

    <p>Acquired traits alter an individual's DNA for future generations.</p> Signup and view all the answers

    Why did Lamarck's theories fail to explain the mechanism of natural selection?

    <p>He did not consider how only advantageous traits become more common over time.</p> Signup and view all the answers

    What was a significant difference between Lamarck and Mendel's understanding of trait inheritance?

    <p>Mendel showed that genetic information is passed on unchanged, unlike Lamarck's belief in acquired traits inheritance.</p> Signup and view all the answers

    Why did Lamarck's theories lack predictive power compared to modern evolutionary biology?

    <p>He misunderstood how adaptations arise and are passed on through generations.</p> Signup and view all the answers

    What was one of the main reasons why Lamarck's ideas were overshadowed by modern evolutionary biology?

    <p>Genetic inheritance was lacking in Lamarck's theories compared to modern biology.</p> Signup and view all the answers

    What aspect of genetic information transmission did Lamarck misunderstand?

    <p>'Organisms pass on genetic information they acquire during their lifetime.'</p> Signup and view all the answers

    'Law' of Use and Disuse, a concept central to Lamarck's theories, suggested that:

    <p>'Unused structures would deteriorate over time due to disuse.'</p> Signup and view all the answers

    Which French biologist is credited with developing the theory of Lamarckism?

    <p>Jean Baptiste de Lamarck</p> Signup and view all the answers

    What were the two main concepts that formed the basis of Lamarck's theory of Lamarckism?

    <p>The 'Law' of Use and Disuse and the 'Law' of Inheritance of Acquired Characteristics</p> Signup and view all the answers

    According to Lamarck's 'Law' of Use and Disuse, what would happen to a structure if an organism did not use it?

    <p>It would become less significant or disappear over generations</p> Signup and view all the answers

    What did Lamarck believe about the inheritance of acquired characteristics in his theory?

    <p>They could be passed down to offspring</p> Signup and view all the answers

    Why were Lamarck's ideas later rejected by the scientific community?

    <p>Due to lack of empirical evidence supporting his claims</p> Signup and view all the answers

    In Lamarck's theory, what was the role of an organism's frequent use of a particular organ?

    <p>It would result in the organ becoming more developed over time</p> Signup and view all the answers

    Which scientist famously suggested that giraffes developed long necks due to stretching their necks to reach higher leaves?

    <p>Jean Baptiste de Lamarck</p> Signup and view all the answers

    What was the main concept behind Lamarck's 'Law' of Inheritance of Acquired Characteristics?

    <p>Changes acquired during an organism's lifetime could be passed down to offspring</p> Signup and view all the answers

    What was the main reason why Lamarck's theories were rejected?

    <p>Contradiction with Mendel's genetics.</p> Signup and view all the answers

    Why did natural selection play a crucial role in the rejection of Lamarck's theories?

    <p>It provided a random process for adaptation.</p> Signup and view all the answers

    Which concept did Lamarck fail to consider, leading to the rejection of his theories?

    <p>Genetic information transmission through genes.</p> Signup and view all the answers

    Why did Lamarck's theories lack predictive power compared to modern evolutionary biology?

    <p>They misunderstood how adaptations arise and are passed on.</p> Signup and view all the answers

    What was the main flaw in Lamarck's concept of purposeful adaptation to the environment?

    <p>It ignored the importance of genetic information.</p> Signup and view all the answers

    What key aspect of genetic information did Lamarck misunderstand that contributed to the rejection of his theories?

    <p>The non-alterability of genes by acquired traits.</p> Signup and view all the answers

    How did the discovery of genetic inheritance contradict Lamarck's ideas?

    <p>It revealed that acquired traits cannot be passed on through genes.</p> Signup and view all the answers

    Why did the development of the modern synthesis of evolutionary biology sideline Lamarckism?

    <p>Because it integrated genetics with Darwin's natural selection.</p> Signup and view all the answers

    What was one of the main contradictions between Mendel's genetics and Lamarck's theories?

    <p>Mendel proposed genetic transmission through DNA, while Lamarck suggested alteration by lifestyle changes.</p> Signup and view all the answers

    How did Charles Darwin's natural selection differ from Lamarck's idea of purposeful change?

    <p>Natural selection is a random process based on advantageous traits, while purposeful change is directed by the environment.</p> Signup and view all the answers

    According to Lamarck's theory, what would happen to a structure if an organism frequently used it?

    <p>The structure would become more developed over time.</p> Signup and view all the answers

    Why did Lamarck propose the 'Law' of Inheritance of Acquired Characteristics in his theory?

    <p>To explain how acquired traits could be passed on to offspring.</p> Signup and view all the answers

    In Lamarck's theory, what was the main consequence of an organism not using a structure?

    <p>The structure would disappear over generations.</p> Signup and view all the answers

    What was the fundamental idea behind Lamarck's 'Law' of Use and Disuse?

    <p>Structures change based on their usage and significance.</p> Signup and view all the answers

    Why did Lamarck believe that giraffes developed long necks in his theory?

    <p>Because they stretched their necks to reach higher leaves.</p> Signup and view all the answers

    How did Lamarck differ from Mendel in understanding trait inheritance according to his theory?

    <p>Lamarck thought acquired characteristics were inherited, while Mendel focused on allele segregation.</p> Signup and view all the answers

    What was one of the major reasons why Lamarck's ideas were later rejected by the scientific community?

    <p>'Law' of Inheritance of Acquired Characteristics contradicted known genetic principles.</p> Signup and view all the answers

    What was a key difference between Lamarck and Charles Darwin regarding trait development?

    <p>Lamarck believed organisms could choose their traits, whereas Darwin focused on random variations.</p> Signup and view all the answers

    Why did Lamarck suggest that an organism frequently using a particular organ would lead to its development?

    <p>Due to a direct influence of physiological changes on evolutionary trajectory.</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser