Phenylketonuria (PKU) is a genetic disorder in which

A) the body produces too much of the amino acid phenylalanine.
B) the body cannot break down the amino acid phenylalanine.
C) a lack of phenylalanine, if not supplemented, causes intellectual disability.
D) a missing enzyme can be supplied by a protein-rich diet.

B

Psychology

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What is an educated guess that states a predicted relationship between events or variables?

a) theory b) hypothesis c) inferential statistic d) independent variable

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