Dr Burkholder Hypothesized That Pfiesteria Was Associated with the Massive

question 33

Multiple Choice

Dr. Burkholder hypothesized that Pfiesteria was associated with the massive die-offs of estuarine fish. Her hypothesis was supported when

• A)Pfiesteria was shown to be capable of living within the climatic ranges of North Carolina.
• B)a predicted increase in Pfiesteria populations coincided with a fish die-off.
• C)new observations revealed Pfiesteria could kill laboratory fish.
• D)a virulent toxin was isolated from Pfiesteria cultures grown in the laboratory.

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Definitions:

PhMgCl

Phenylmagnesium chloride, a Grignard reagent used in organic synthesis to form carbon-carbon bonds.

Mechanism

Describes the step-by-step process by which reactants are converted into products in a chemical reaction.

Grignard Reagent

An organomagnesium compound used in chemistry for creating new carbon-carbon bonds.

Alkyl Halides

Organic compounds containing a halogen atom(X) bonded to an sp3-hybridized carbon atom, used in many chemical reactions and synthesis.