The Origins of Life
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Questions and Answers

Which of the following is a necessary compound for life on Earth?

  • Nitrogen
  • Oxygen
  • Carbon dioxide (correct)
  • Helium

    • What is the role of water in the development of life on Earth?

  • It serves as a source of energy for life forms
  • It helps in the growth and reproduction of life forms
  • It provides a liquid solvent for ingredients to react with each other (correct)
  • It acts as a protective barrier for life forms

    • What were the conditions like on the young planet Earth when the first life forms emerged?

  • Completely devoid of any environmental conditions
  • Ideal for living things
  • Hostile with extreme temperatures (correct)
  • Moderate and stable

    • What is the source of energy for all life forms?

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

    What are autotrophs?

    <p>Life forms that can convert sunlight into energy</p> Signup and view all the answers

    What are the basic necessities for any life form?

    <p>Elements and compounds essential to life including hydrogen, methane, nitrogen, carbon dioxide, phosphates, and ammonia, and a liquid solvent: water.</p> Signup and view all the answers

    What is the role of water in the development of life on Earth?

    <p>Water is a liquid solvent that allows the necessary ingredients for life to comingle and react with each other.</p> Signup and view all the answers

    What gave rise to every species that has inhabited Earth?

    <p>The simple organic compounds that assembled into more complex coalitions and were the first life on Earth.</p> Signup and view all the answers

    What were the conditions like on the young planet Earth when the first life forms emerged?

    <p>The young planet had widespread volcanic activity and an atmosphere that created hostile conditions.</p> Signup and view all the answers

    What do all life forms need in order to grow and reproduce?

    <p>All life forms need a source of energy.</p> Signup and view all the answers

    What is the acronym for the Last Universal Common Ancestor?

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

    When is Luca estimated to have lived?

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

    What are the three great domains of life?

    <p>bacteria, archaea, and eukaryotes</p> Signup and view all the answers

    Which two domains are believed to be the two earliest?

    <p>bacteria and archaea</p> Signup and view all the answers

    What do eukaryotes include?

    <p>all plants and animals</p> Signup and view all the answers

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