An Experimental Test of the Hypothesis to Explain the Origin

question 66

Multiple Choice

An experimental test of the hypothesis to explain the origin of the first organic compounds on Earth might include all of the following sequential steps (starting with A and proceeding to E) except

• A)assembling an atmosphere with H₂,CH₄,NH₃,and H₂S.
• B)placing this atmosphere over liquid water.
• C)inoculating with a few bacteria to get the process started.
• D)increasing the temperature of the gases.
• E)providing energy with electrical spark discharges.

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Definitions:

Action Potential

An action potential is a rapid electrical impulse that travels along the membrane of a neuron or muscle cell, facilitating communication and response.

Plasma Membrane

A two-layer lipid membrane that surrounds the cytoplasm within a cell, governing how substances move in and out.

Depolarization

The process during which a cell's membrane potential becomes less negative, making it more likely to fire an action potential.

Absolute Refractory Period

A period immediately following an action potential during which a neuron is incapable of generating another action potential, no matter the stimulus strength.