Natural Selection

question 33

Multiple Choice

Natural selection:

• A)acts on alleles already present in the population
• B)explains how antibiotic resistance can be maintained in a population
• C)doesn't consider competition between strains
• D)two of the above

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Definitions:

pKa Values

A quantitative measure that indicates the strength of an acid; it's the logarithmic constant of a compound's dissociation in water.

Acids

Substances that donate protons (H+) in a chemical reaction and have a pH less than 7 in an aqueous solution.

pH

A measure of the acidity or alkalinity of a solution, on a scale in which 7 is neutral, lower values are more acidic, and higher values are more alkaline.

Aqueous Solution

A solution where water is the solvent in which solutes are dissolved.