The limit of detection in the microbiology laboratory is termed:
a. specificity.
b. sensitivity.
c. precision.
d. variation.
B
The sensitivity of a test refers to the ability to detect a particular organism or analyte with a 0.95 confidence level plus or minus 2 standard deviations.
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What is the correct organization in plants, from smallest to largest?
A. Tissues, organs, tissue systems, cells B. Cells, organs, tissue systems, tissues C. Cells, tissues, tissue systems, organs D. Cells, organs, tissues, tissue systems
In a mycorrhizal relationship, fungi supply ____ and plants supply ____
a. water; sugars b. minerals; starch c. minerals; sugars and nitrogen-rich compounds d. sugars; minerals and water e. nitrogen; minerals
Artificially constructed movement corridors
A) increase inbreeding. B) reduce dispersal. C) can be harmful because they allow for the spread of disease. D) can be harmful because they create isolated habitats.
Which of the following best describes the role of regulatory T cells?
A) Regulatory T cells are a kind of helper T cell that stimulates B cells. B) Regulatory T cells stimulate natural killer cells to attack tumors. C) Regulatory T cells are a kind of helper T cell that stimulates cytotoxic T cells. D) Regulatory T cells stabilize and support memory cells. E) Regulatory T cells help limit the immune system response.