land plants part 3
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Questions and Answers

True or false: The first photosynthetic organisms appeared 2.5 billion years ago.

False

When did the first photosynthetic organisms appear?

  • 2.5 billion years ago (correct)
  • Not mentioned in the text
  • 470 million years ago
  • 3.5 million years ago
  • What event contributed to the increase in oxygen levels in the atmosphere?

  • The development of modern transportation fuels
  • The use of conifers for paper and lumber production
  • The emergence of seed plants
  • The appearance of photosynthetic organisms (correct)
  • True or false: Land plants emerged 570 million years ago.

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

    What contributed to the increase in oxygen levels in the atmosphere?

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

    What type of plants are important seed crops for agriculture?

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

    Which group of plants transformed the Cenozoic Era?

    <p>Seed plants, especially angiosperms</p> Signup and view all the answers

    What were resin derivatives used for historically?

    <p>All of the above</p> Signup and view all the answers

    True or false: Seed plants, particularly angiosperms, had no impact on the Cenozoic Era.

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

    What are conifers primarily used for?

    <p>Paper and lumber production</p> Signup and view all the answers

    True or false: Secondary metabolites have never been used for anything other than medicine.

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

    When did oxygen begin gassing out from the seas and into the atmosphere?

    <p>2.5 billion years ago</p> Signup and view all the answers

    True or false: Resin derivatives, such as rosin and pitch, had no significant use in the past.

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

    What type of plants are used for paper and lumber production?

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

    Which type of plants are important seed crops for agriculture?

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

    True or false: Modern research is not focused on using plants for sustainable transportation fuels.

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

    What era was transformed by seed plants, especially angiosperms?

    <p>Cenozoic Era</p> Signup and view all the answers

    What have secondary metabolites historically been used for?

    <p>Medicine and tanning leather</p> Signup and view all the answers

    True or false: Conifers are used primarily for fruit production.

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

    What were resin derivatives, such as rosin and pitch, important for?

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

    What modern research focus involves using plants?

    <p>Both A and B</p> Signup and view all the answers

    When did land plants emerge?

    <p>470 million years ago</p> Signup and view all the answers

    What is modern research focusing on using plants for?

    <p>Sustainable transportation fuels</p> Signup and view all the answers

    True or false: Angiosperms, such as wheat, rice, and maize, have no importance in agriculture.

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

    Study Notes

    1. Plants dramatically altered the chemistry of the atmosphere by increasing oxygen levels.
    2. First photosynthetic organisms appeared 3.5 billion years ago.
    3. Oxygen began gassing out from the seas and into the atmosphere around 2.5 billion years ago.
    4. Land plants emerged 470 million years ago and contributed to the increase in oxygen levels.
    5. Seed plants, especially angiosperms, transformed the Cenozoic Era.
    6. Gymnosperms, particularly conifers, are used for paper and lumber production.
    7. Angiosperms, such as wheat, rice, and maize, are important seed crops for agriculture.
    8. Secondary metabolites have historically been used for medicine and tanning leather.
    9. Resin derivatives, such as rosin and pitch, were important in shipbuilding.
    10. Modern research focuses on using plants for sustainable transportation fuels and drug delivery through pollen grains.

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