Lecture 10: The Tree of Life and Overview of Animals

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Questions and Answers

What event according to the Big Bang Theory led to the production of matter and energy in our universe?

  • A massive explosion 14 billion years ago (correct)
  • A supernova explosion 4.6 billion years ago
  • A planetary collision 4.5 billion years ago
  • A volcanic eruption 14 billion years ago

What process in stars created the major elements found in present-day biological molecules?

  • Nuclear reactions (correct)
  • Respiration
  • Ionic bonding
  • Photosynthesis

How long ago did Earth form as a hot mass of molten rock?

  • 4.6 billion years ago (correct)
  • 14 billion years ago
  • 10 billion years ago
  • 4.6 million years ago

What do most scientists believe about the origin of life on Earth?

<p>Life arose spontaneously from nonliving matter on Earth (D)</p> Signup and view all the answers

How did chemically-rich oceans form on Earth as it cooled down?

<p>From water condensation (C)</p> Signup and view all the answers

Why was it important for the early Earth's atmosphere to be reducing according to the Oparin-Haldane Hypothesis?

<p>Absence of oxygen in the atmosphere allows for the creation of organic molecules through reduction reactions using natural energy sources. (A)</p> Signup and view all the answers

What role did water play in the early Earth's development according to the provided text?

<p>Water vapor emitted from volcanoes led to the creation of the first oceans, lakes, and rivers. (D)</p> Signup and view all the answers

What were the fundamental properties of life discussed in the text?

<p>Heredity, sensitivity, homeostasis, and metabolism. (A)</p> Signup and view all the answers

According to the RNA World Model mentioned in the text, why is RNA considered to potentially be the first genetic material?

<p>RNA can catalyze chemical reactions like enzymes (ribozymes). (D)</p> Signup and view all the answers

How did primitive organisms in early Earth obtain their necessary resources according to the text?

<p>By being autotrophic and building what they needed. (C)</p> Signup and view all the answers

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