An excretory system that is partly based on the filtration of fluid under high hydrostatic pressure is the _____
A) flame bulb system of flatworms
B) protonephridia of rotifers
C) Malpighian tubules of insects
D) kidneys of vertebrates
D
Biology & Microbiology
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All ________ consist of a thiazolidine ring, a beta-lactam ring, and an R group.
A. penicillins B. aminoglycosides C. cephalosporins D. macrolides E. tetracyclines
Biology & Microbiology
Under what condition might a human female have the XY sex chromosome complement?
What will be an ideal response?
Biology & Microbiology
Which of the following statements is NOT a possible outcome of antigen-antibody reaction?
A) clonal deletion B) activation of complement C) opsonization D) ADCC E) agglutination
Biology & Microbiology
Aseptic means
A. sterile. B. free of all microbes. C. clean. D. sanitized. E. free of pathogens.
Biology & Microbiology