The symptoms of pellagra are due to a lack of
A) riboflavin.
B) thiamin.
C) pantothenic acid.
D) pyridoxine.
E) niacin.
E
Biology & Microbiology
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A relatively common illness in young children, primarily those younger than 3 years of age, whose presentation includes variable fever, inspiratory stridor (difficulty in moving enough air through the larynx), hoarseness, and a harsh, barking, nonproductive cough, is:
a. laryngitis. b. laryngotracheobronchitis. c. epiglottitis. d. pharyngitis.
Biology & Microbiology
Which of the following female organisms contain two different sex chromosomes?
a. humans b. fruit flies c. cows d. butterflies e. cats
Biology & Microbiology
Two different organisms CANNOT have the same scientific name.
a. true b. false
Biology & Microbiology
Which type of covalent bond allows for rotation about the bond axis?
A.) single B.) triple C.) double D.) hydrogen
Biology & Microbiology