Competent cells are cells that
a. can take up DNA from their surrounding environment and integrate it into their own chromosomes by recombination.
b. are also considered "rough-strain" based on colony phenotype.
c. have the ability to produce capsules.
d. are killed by heat.
Answer: a. can take up DNA from their surrounding environment and integrate it into their own chromosomes by recombination.
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Which of the following could be a choice to track the source of hospital-acquired infections?
a. DNA fingerprinting b. determination of sugar-fermentation patterns c. morphology determination d. Gram stain e. acid-fast stain
Which cells are divided into two groups: T cells and B cells?
(A) macrophages (B) lymphocytes (C) platelets (D) complement cells
Proximate causes of behavior have evolutionary explanations
____________________ Indicate whether the statement is true or false.
Most of the homeostatic functions in the body are regulated by positive feedback loops
Indicate whether the statement is true or false