Enterotoxins affect cells in the:
A) respiratory tract.
B) genitourinary tract.
C) gastrointestinal tract.
D) central nervous system.
C) gastrointestinal tract.
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In the stomach, food processing continues and secretions from stomach glands aid the initial digestion of
A. carbohydrates. B. lipids. C. nucleic acids. D. proteins. E. vitamins.
In _____ blood flows through two completely separate circuits
a. birds c. fish b. mammals d. both birds and mammals
Which organisms represent the common ancestor of all photosynthetic plastids found in eukaryotes?
A) autotrophic euglenids B) diatoms C) dinoflagellates D) red algae E) cyanobacteria
Large carbohydrates, such as starch and glycogen, are polymers. What monomers compose large carbohydrates?
A. Fatty acids B. Nucleotides C. Monosaccharides D. Amino acids