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
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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.
The unit of transcription at the molecular level is the gene
Indicate whether the statement is true or false
A kidney dialysis machine removes solutes from the blood by means of:
a. osmosis b. exocytosis c. diffusion d. active transport e. bulk flow
Which of the following atmospheric gases is changing the global climate?
A. hydrogen B. carbon dioxide C. oxygen D. ozone E. water vapor