The Egyptians believed in all of the following race categories except:

A. yellow
B. red
C. white
D. brown


Answer: B. red

Biology & Microbiology

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Of the asaccharolytic, oxidase-positive bacilli that do not grow on MacConkey agar, which one of the following organisms is generally associated with mixed infections resulting from bites or clenched-fist wounds?

a. Eikenella corrodens b. Weeksella virosa c. Pseudomonas maltophilia d. Sphingomonas paucimobilis

Biology & Microbiology

Evaluate the following statements. Which one is most accurate?

A. Since bacteria reproduce asexually, all bacteria originating from one source are genetically identical to each other. B. While bacteria reproduce asexually, they use many mechanisms to transfer genetic materials between each other and as such as not all genetically identical to each other. C. Bacteria reproduce sexually, and have many mechanisms to spread their genetic materials to other bacteria. D. Bacteria reproduce asexually, and as such do not have mechanisms to generate genetic diversity among themselves.

Biology & Microbiology

Which neurotransmitter is blocked by caffeine?

-Adenosine -GABA -Melatonin -Dopamine

Biology & Microbiology

UV water treatment systems are effective in treating ________.

A. protozoans B. bacteria C. viruses D. All of these choices are correct.

Biology & Microbiology