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The first cells were likely heterotrophs, who "fed" on the organic molecules, or chemoautotrophs, who used the energy in inorganic molecules.

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Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
  • Read
    First Cells

    First Cells

    by CK-12 //at grade
    Describes the first cells and the evolution of photosynthesis and cellular respiration.
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  • Read
    5.4 First Cells

    5.4 First Cells

    by Jeff Huska //at grade
    Describes the first cells and the evolution of photosynthesis and cellular respiration.
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  • Read
    First Cells

    First Cells

    by biologyepisd //at grade
    Describes the first cells and the evolution of photosynthesis and cellular respiration.
    MEMORY METER
    This indicates how strong in your memory this concept is
  • Read
    First Cells

    First Cells

    by Erin Schmidt //at grade
    Describes the first cells and the evolution of photosynthesis and cellular respiration.
    MEMORY METER
    This indicates how strong in your memory this concept is
  • Read
    First Cells

    First Cells

    by Jared Lovering //at grade
    Describes the first cells and the evolution of photosynthesis and cellular respiration.
    MEMORY METER
    This indicates how strong in your memory this concept is
  • Read
    The First Cells - Advanced

    The First Cells - Advanced

    by CK-12 //
    Examines Earth's first cells.
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  • Video
    Life Before Oxygen

    Life Before Oxygen

    by CK-12 //basic
    Talks about how photosynthetic organisms transformed the Earth's atmosphere and life on Earth.
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  • Downloadable Quiz
    First Cells Quiz

    First Cells Quiz

    by CK-12 //at grade
    Quiz on First Cells
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  • Practice
    First Cells Practice
    Estimated3 minsto complete

    First Cells Practice

    by CK-12 //at grade
     
     
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  • Critical Thinking
    First Cells Discussion Questions

    First Cells Discussion Questions

    by CK-12 //at grade
    A list of student-submitted discussion questions for First Cells.
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  • Real World Application
    Deep Sea Snow

    Deep Sea Snow

    by Andrea Pokrzywinski //at grade
    Covers hydrothermal vents and the chemosynthetic based communities found there.
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  • Real World Application
    Deep Sea Snow

    Deep Sea Snow

    by CK-12 //at grade
    Covers hydrothermal vents and the chemosynthetic based communities found there.
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  • Real World Application
    Life Without Oxygen?

    Life Without Oxygen?

    by CK-12 //at grade
    Covers life in anoxic environments exploring the chemical basis of life, addressing exobiology, evolution, and ecology.
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  • Real World Application
    Burning Ice

    Burning Ice

    by CK-12 //at grade
    Covers the formation of gas hydrates, looking at how they form the base of some ecosystems and are being looked at as a fuel source.
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  • Real World Application
    Are You Going To Eat That?

    Are You Going To Eat That?

    by CK-12 //at grade
    Learn about the diversity of Protista and their place in the Eukarya.
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  • Study Guide
    Earth Forms and Life Begins Study Guide

    Earth Forms and Life Begins Study Guide

    by CK-12 //at grade
    This study guide provides a brief timeline of Earth's history and the origin of life, including RNA world hypothesis and endosymbiosis. It also looks at carbon dating.
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  • Flashcards
    First Organic Molecules and Cells Flashcards

    First Organic Molecules and Cells Flashcards

    by CK-12 //at grade
    These flashcards help you study important terms and vocabulary from First Organic Molecules and Cells.
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