You are viewing a sputum smear that has been stained with an acid-fast stain. On this smear you see 5 um long pink rod-shaped bacteria. You can conclude that:
A.These are gram- normal microbiota
B. There are no acid-fast bacilli seen in this specimen
C. These are acid-fast normal microbiota
D. There are acid-fast bacilli in this specimen
Answer: D. There are acid-fast bacilli in this specimen
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Which of the following statements is true regarding microbial mats?
A. They contain archaeons. B. They contain oxygenic photosynthetic bacteria. C. They contain anoxygenic photosynthetic bacteria. D. Sunlight does not reach microbial mat levels inhabited by chemoautotrophs. E. All of these answer options are correct.
Which assisted reproductive technology involves the maturation and fertilization of the egg within laboratory glassware, followed by transfer of the embryo to the uterus 2-4 days later?
A. Surrogate mother B. In vitro fertilization C. Artificial insemination D. Intracytoplasmic sperm injection E. Gamete intrafallopian transfer
Bones such as the humerus and femur are examples of which kind of bones?
a. long b. short c. flat d. irregular e. sesamoid
Which of the following results from the combination of antibodies and antigens?
a. activation of the pathogen b. formation of cytotoxic T cells c. stimulation of phagocytosis d. activation of toxins e. inactivation of the complement system