If everything else is equal, the best way to observe more details in a microscopic specimen is to
A. increase resolution.
B. increase magnification
A
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External signals, such as hormones and growth factors, can stimulate a cell to go through the cell cycle.
Answer the following statement true (T) or false (F)
Mutagenic chemicals that ____ and are incorporated into DNA or RNA during synthesis are called base analogs
a. resemble nucleotides b. resemble genes c. resemble amino acids d. cause deletion mutations e. cause frameshift mutations
All of the following are true of the classical pathway of complement activation except __________.
A) activated C1 activates C2 and C4 B) C3 is the first component to be activated C) C5b joins C6, C7, C8, and C9 to form the membrane attack complex D) C1 is activated by an antigen-antibody complex E) activated C2a and C4b activate C3
Most of the diseases caused by the members of the family Rickettsiaceae require a vector for the transmission of the diseases. Which of the following diseases does not require an arthropod vector?
A. Q Fever B. Rocky Mountain Spotted Fever C. Ehrlichiosis D. Epidemic Typus E. Endemic Typhus