Unit 6 Origin of Life - DAY 2

Multiple Choice

Which of these activities would be LEAST likely to help scientists explain the origin of life on Earth?

• determining how pollution is affecting life in the ocean

• determining how the atmosphere became rich in oxygen

• determining how cells could develop from nonliving matter

• determining how organelles developed from symbiotic organisms

Open Ended

Why is it important to understand the scientific explanations for the origin of life on Earth?

Multiple Choice

Which of the following describes why the Miller-Urey theory is widely accepted today?

• Organic molecules are present today in extremely high concentrations

• The process of synthesizing organic molecules from a mixture of gases has been successfully modeled in the laboratory

• Amino acids spontaneously form from molecules in the atmosphere today

• No other alternative hypotheses have been introduced

Open Ended

Describe the sequence of major events in the origin of life as shown in the diagram.

Open Ended

Explain how the Oparin-Haldane and Endosymbiosis hypotheses contribute to our understanding of the origin of life.

Fill in the Blank

The first living cells to form in the seas were ___-cell prokaryotes.

Multiple Choice

Which hypothesis explains the formation of small organic molecules in the seas during the origin of life?

• Oparin-Haldane Hypothesis

• Endosymbiosis Hypothesis

• Cell Theory

• Evolutionary Theory

Multiple Choice

In the 1950s, Stanley Miller performed experiments to study the origins of life. He created an atmosphere rich in methane, hydrogen, ammonia, water, and simulated lightning. Which substances were most likely produced during Miller’s experiments?

• protists

• bacteria

• amino acids

• RNA strands

Open Ended

Reflecting on today's lesson about the origin of life, what is one question you still have or one aspect you would like to explore further?

Multiple Choice

One of the accepted scientific theories describing the origin of life on Earth is known as chemical evolution. According to this theory, which of the following events would need to occur first for life to evolve?

• onset of photosynthesis

• origin of genetic material

• synthesis of organic molecules

• formation of the plasma membrane