A person who is infected with a potential pathogen fails to develop signs or symptoms of disease. This correlates with ________ initial microbial dose, ________ microbial lethality, and/or ________ replication rate of the pathogen.
A. low; high; low
B. low; low; high
C. high; low; high
D. high; low; low
Answer: A
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Bacterial strains that have distinct antigenic properties are called ________.
Fill in the blank(s) with the appropriate word(s).
Which value(s) would be required to calculate how long ago the most recent ancestor of ungulates lived?
I) the number of base pairs that differ among species in a certain genetic sequence II) the total number of base pairs in the genetic sequence examined III) the age of a fossil ancestor for calibration A) I B) II C) III D) I, II, and III
What is typical osmolarity of body fluids in most marine invertebrates?
a. about 1500 mOsm/L b. about 1000 mOsm/L c. about 225 mOsm/L d. about 5 mOsm/L
Which is not true about the value of 3-D printing in regenerating organs?
A) It is used to apply the cells to the scaffolding. B) It is used to create complicated organs. C) It is used to create the scaffolding to hold the tissue. D) All of these are true.