Consider the Following Experiment

question 22

Multiple Choice

Consider the following experiment. First, large populations of two mutant strains of Escherichia coli are mixed, each requiring a different, single amino acid. After plating them onto a minimal medium, 45 colonies grew. Which of the following may explain this result?

• A) The colonies may be due to back mutation (reversion).
• B) The colonies may be due to recombination.
• C) Either A or B is possible.
• D) Neither A nor B is possible.

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Definitions:

Organismic Model

Model that views human development as internally initiated by an active organism and as occurring in a sequence of qualitatively different stages.

Naturalistic

Related to observing and studying phenomena in their natural environment without artificial interference.

Quantitative Changes

Changes that can be measured or quantified, typically referring to growth or alteration in size, amount, or degree.

Documenting

involves the process of recording or capturing information for the purpose of preserving or providing evidence.