Expectorated sputum is:
a. acceptable.
b. not acceptable.
B
Because indigenous anaerobes are often present in large numbers as normal flora on mucosal surfaces, even minimal contamination of a specimen can give misleading results. Specimens that are likely to be contaminated are unacceptable for anaerobic culture. Respiratory secretions that pass through the upper respiratory tract will likely be contaminated with upper respiratory tract flora.
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Passive immunity can provide immunity ____
a. temporarily b. permanently
c. for months d. for many years e. for an entire lifetime
Which of the following are biotic interactions in an ecosystem?
A. competition and competitive exclusion B. mutualism and parasitism C. herbivory and predation D. None of the answers are biotic interactions. E. All of the answers are biotic interactions.
Which part of the digestive tract has the lowest pH?
A) Small intestine B) Stomach C) Rectum D) Large intestine E) Pancreas
You are made up of ______ cells, while bacteria are ________ cells.
Fill in the blank(s) with the appropriate word(s).