This disease is caused by strains of Streptococcus pyogenes which produce an erythrogenic toxin due to the presence of a lysogenized bacteriophage

A) necrotizing fasciitis
B) scarlet fever
C) rheumatic fever
D) bacterial pneumonia
E) streptococcal pharyngitis


Answer: B

Biology & Microbiology

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All fungi are _____

A) symbiotic B) heterotrophic C) flagellated D) pathogenic E) decomposers

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Indicate the cell types that are most likely involved in tissue rejection.

A. Cytotoxic T cells B. Macrophages C. T helper cells D. B cells E. Neutrophils

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The feeding habits of lampreys are best described as ____

a. suspension feeding b. predatory c. parasitic d. scavenging e. filter feeding

Biology & Microbiology

What is the advantage of having grape-like clusters called alveoli as part of the respiratory system?

A) Alveoli allow for an increase in surface area, which maximizes gas exchange. B) Alveoli are circular in structure, which is ideal for maximal gas exchange. C) Because alveoli have thinner walls, gas exchange in the lungs is facilitated. D) The grape-like shape of alveoli allows capillaries to be in closer proximity to gases.

Biology & Microbiology