Symptoms of phenylketonuria (PKU) may be
minimized or suppressed by a diet low in
a. serine.
b. glycine.
c. phenylalanine.
d. proline.
e. glutamic acid.
C
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Which of the following is (are) unique to animals?
A) cells that have mitochondria B) the structural carbohydrate, chitin C) nervous system signal conduction and muscular movement D) heterotrophy E) flagellated gametes
The human large intestine is about _____ in length.
A. 1.5 m B. 6 m C. 7.5 m D. 15 m E. 30 m
The specific causative agent of a disease is called ______ and the way the disease develops is ____
a. Portal of entry; portal of exit b. Medical infection; pathogenic microbiology c. Invasiveness;progression d. Etiology;pathogenesis
A population size will remain stable if
A) the birth and death rates are equal, as are the rates of emigration and immigration. B) the number of births each year is constant and the birth rate is higher than the death rate. C) the rate of emigration is higher than the rate of immigration. D) environmental resistance declines each year. E) the population grows by a fixed percentage of its size each year.