Which Step in the Evolution of Life Is the Most

question 9

Multiple Choice

Which step in the evolution of life is the most complex and probably occurred last?​

• A) ​formation of DNA
• B) ​formation of protein-RNA systems
• C) ​formation of membrane-bound proto-cells
• D) ​spontaneous formation of organic compounds under abiotic conditions
• E) ​formation of ATP

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Definitions:

Direct Control

The management or regulation of variables in an experiment to ensure that any observed effects are due to the manipulation of the independent variable.

Extraneous Variables

Variables that are not the focus of a study but could influence the results, potentially leading to confounding effects if not controlled.

Randomization

The process of randomly assigning subjects to different groups in a study, minimizing biases and ensuring variability.

Dependent Variable

The outcome factor that researchers measure in an experiment to see if it changes in response to manipulations of the independent variable.