Development of drug resistance is encouraged by
A. use of two drugs simultaneously with the hope that each will prevent the emergence of resistance to the other.
B. widespread use of broad-spectrum drugs.
C. using drugs appropriate for the infectious agent being treated.
D. avoidance of indiscriminate use of drugs.
E. use of a high enough concentration of the drug to destroy any spontaneous resistant mutants that might arise.
Answer: B
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In conjugation, transformation, or transduction, the recipient bacteria is most likely to accept donor DNA
A. from any source. B. from any species of bacteria. C. from the same species of bacteria. D. only through plasmids. E. from any source AND only through plasmids.
A falsifiable hypothesis cannot be tested
__________________ Indicate whether the statement is true or false.
________ is used by white blood cells to consume large particles such as bacteria
Fill in the blank(s) with correct word
Answer the following statement(s) true (T) or false (F)
1. Facultative anaerobes do not have the correct enzymes, and will not survive in the presence of oxygen. 2. Bacterial cells generally have a cell wall which protects them from osmotic changes in their environment, while animal cells do not and so are more sensitive to osmotic shifts. 3. Pasteurization sterilizes milk. 4. You will need to do a serial dilution for the standard plate count water test. 5. Protists are a large and diverse group, including organisms such as algae.