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Lecture 10: The Tree of Life and Overview of Animals

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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?

Life arose spontaneously from nonliving matter on Earth Signup and view all the answers

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

From water condensation 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?

Absence of oxygen in the atmosphere allows for the creation of organic molecules through reduction reactions using natural energy sources. Signup and view all the answers

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

Water vapor emitted from volcanoes led to the creation of the first oceans, lakes, and rivers. Signup and view all the answers

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

Heredity, sensitivity, homeostasis, and metabolism. 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?

RNA can catalyze chemical reactions like enzymes (ribozymes). Signup and view all the answers

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

By being autotrophic and building what they needed. Signup and view all the answers