In 1928, Frederick Griffith's Experiments with Streptococcus Pneumoniae Suggested That

question 25

Multiple Choice

In 1928, Frederick Griffith's experiments with Streptococcus pneumoniae suggested that

• A)DNA was conclusively the molecule of heredity.
• B)attenuated R (rough)bacteria easily revert to the wild type (virulent).
• C)bacteria do not incorporate the DNA of other bacteria.
• D)heat- killed bacteria could somehow "transform" live bacteria.
• E)all of the above

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Definitions:

Difference Threshold

The minimum difference in stimulation that a person can detect 50 percent of the time, also known as the Just Noticeable Difference (JND).

Absolute Threshold

The smallest level of a stimulus that can be detected by the senses, such as the lightest touch or quietest sound perceivable.

Absolute Threshold

The smallest level of stimulus that can be detected by a sense (hearing, sight, touch, etc.) at least 50% of the time.

Minimum Threshold

The lowest level at which a stimulus can be detected by the senses.