Which of the following are found primarily in the intestines of humans?

A) gram-negative aerobic rods and cocci
B) aerobic, helical bacteria
C) facultatively anaerobic gram-negative rods
D) gram-positive cocci
E) endospore-forming rods


C

Biology & Microbiology

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The unit of transcription at the molecular level is the gene

Indicate whether the statement is true or false

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A kidney dialysis machine removes solutes from the blood by means of:

a. osmosis b. exocytosis c. diffusion d. active transport e. bulk flow

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Because thaumarchaeote archaeons reduce CO2 in their environments to produce organic compounds and also oxidize inorganic substances to gain energy, they are:

A. chemoautotrophs. B. chemoheterotrophs. C. photoautotrophs. D. photoheterotrophs.

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Which of the following atmospheric gases is changing the global climate?

A. hydrogen B. carbon dioxide C. oxygen D. ozone E. water vapor

Biology & Microbiology