CH 10: Representations of Life's History
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Questions and Answers

When did the first true plants with vascular systems to transport nutrients emerge?

  • Approximately 1.2 billion years ago
  • Around 600 million years ago
  • Approximately 525 million years ago
  • About 450 million years ago (correct)

    • What is the significance of the Cambrian Explosion in relation to vertebrates?

  • It marks the breakup of Pangea
  • It is when the first vertebrates appeared (correct)
  • It signals the development of algae
  • It marks the emergence of invertebrates

    • Which is NOT a division of the geological timescale?

  • Eras
  • Ages (correct)
  • Periods
  • Eons

    • How did continental drift impact the distribution and evolution of organisms?

    <p>It altered habitats and climate conditions</p> Signup and view all the answers

    What is the main feature that distinguishes eras from eons in the geological timescale?

    <p>Eras mark significant worldwide changes in flora and fauna</p> Signup and view all the answers

    During which geological event did invertebrates arise?

    <p>Cambrian Explosion</p> Signup and view all the answers

    What theory is supported by evidence from fossil records and studies of the Earth's crust?

    <p><strong>Continental Drift</strong></p> Signup and view all the answers

    What marked a period of rapid diversification known as the Cambrian Explosion?

    <p>Invertebrates arising</p> Signup and view all the answers

    Approximately when did the first life forms emerge on Earth?

    <p>3.5 billion years ago</p> Signup and view all the answers

    What type of organisms were the first life forms on Earth?

    <p>Simple single-celled organisms</p> Signup and view all the answers

    When did certain bacteria evolve the ability to perform photosynthesis?

    <p>3.5 billion years ago</p> Signup and view all the answers

    What are cells called that contain a nucleus and other organelles?

    <p>Eukaryotes</p> Signup and view all the answers

    When did more complex cells called eukaryotes evolve?

    <p>1.9 billion years ago</p> Signup and view all the answers

    When did the first multicellular organisms develop?

    <p>1.7 billion years ago</p> Signup and view all the answers

    What did the evolution of photosynthesis lead to?

    <p>The oxygenation of the atmosphere</p> Signup and view all the answers

    What marked a significant turning point in the evolution of Earth's atmosphere?

    <p>The evolution of photosynthesis</p> Signup and view all the answers

    Which type of cells contain a nucleus and compartmentalized organelles?

    <p>Eukaryotic cells</p> Signup and view all the answers

    What type of organisms were the first life forms to emerge around 3.5 billion years ago?

    <p>Archaea</p> Signup and view all the answers

    Around what time period did the first multicellular organisms develop?

    <p>1.7 billion years ago</p> Signup and view all the answers

    What pivotal process led to the oxygenation of Earth's atmosphere?

    <p>Evolution of photosynthesis</p> Signup and view all the answers

    Which event involved the development of more complex cells with a nucleus and organelles?

    <p>Rise of eukaryotes</p> Signup and view all the answers

    What was a key outcome of certain bacteria evolving the ability to perform photosynthesis?

    <p>Oxygenation of the atmosphere</p> Signup and view all the answers

    What was the primary characteristic of the first organisms to live in water?

    <p>Performance of photosynthesis</p> Signup and view all the answers

    What event led to the emergence of vertebrates?

    <p>Cambrian Explosion</p> Signup and view all the answers

    What is the largest unit of time on the geological timescale?

    <p>Eon</p> Signup and view all the answers

    What was the single landmass that broke apart due to continental drift?

    <p>Pangea</p> Signup and view all the answers

    What influenced the distribution and evolution of organisms according to the theory of continental drift?

    <p>Habitat alteration and climate conditions</p> Signup and view all the answers

    Approximately how many years ago did the first true plants with vascular systems emerge?

    <p>450 million years ago</p> Signup and view all the answers

    What is subdivided into eras on the geological timescale?

    <p>Eons</p> Signup and view all the answers

    What is a characteristic that distinguishes periods from eras on the geological timescale?

    <p>Type and distribution of flora and fauna</p> Signup and view all the answers

    When did the evolution of photosynthesis occur?

    <p>Approximately 3.5 billion years ago</p> Signup and view all the answers

    What was the main outcome of the rise of eukaryotes?

    <p>Formation of specialized tissues and organs</p> Signup and view all the answers

    When did the emergence of multicellular life occur?

    <p>Around 1.7 billion years ago</p> Signup and view all the answers

    What characterized the first life forms to emerge on Earth?

    <p>Simple single-celled organisms</p> Signup and view all the answers

    What is the significance of the evolution of photosynthesis?

    <p>Oxygenation of the atmosphere</p> Signup and view all the answers

    Which event led to the development of more complex cells containing a nucleus and organelles?

    <p>Rise of eukaryotes</p> Signup and view all the answers

    Approximately when did certain bacteria evolve the ability to perform photosynthesis?

    <p>Approximately 3.5 billion years ago</p> Signup and view all the answers

    What is the primary reason for the emergence of vertebrates and invertebrates during the Cambrian Explosion?

    <p>Competition for limited resources</p> Signup and view all the answers

    What is the main factor that influenced the distribution and evolution of organisms according to the theory of continental drift?

    <p>Alteration of habitats and climate conditions</p> Signup and view all the answers

    What is the characteristic that distinguishes eons from eras on the geological timescale?

    <p>Duration of time span</p> Signup and view all the answers

    What was the primary outcome of the breakup of the single landmass Pangea?

    <p>Distribution and evolution of organisms</p> Signup and view all the answers

    During which geological event did algae, the precursors to plants, emerge?

    <p>Approximately 1.2 billion years ago</p> Signup and view all the answers

    What is the primary reason for the subdivision of eras into periods on the geological timescale?

    <p>Distinct types of life existing at the time</p> Signup and view all the answers

    What is the significance of the emergence of invertebrates and vertebrates during the Cambrian Explosion?

    <p>Represents a period of rapid diversification of life</p> Signup and view all the answers

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