In the staphylococcus aureus, all of the following are cell wall virulence factors EXCEPT

A. Superantigen exotoxins
B. capsule
C. Protein A
D. Fibronectin-binding protein


Answer: A. Superantigen exotoxins

Biology & Microbiology

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An embryo impants in the uterus when it reaches the _______ stage of development.

Fill in the blank(s) with the appropriate word(s).

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The type of system depicted in the accompanying figure:a

can be found in arthropods. b. can be found in cephalopods. c. can be found in annelids. d. has hemoglobin as the oxygen transporting pigment. e. can be found in arthropods and annelids.

Biology & Microbiology

Some local populations, and occasionally entire species, have reduced genetic diversity because their populations were severely reduced in the past. This is called a 

A. genetic bottleneck. B. frequency loss effect. C. genetic drift. D. population drain.

Biology & Microbiology

To assess if a cell is in an appropriate condition to divide, the cell employs sensors called ______ proteins.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology