The largest group of prokaryotes is the ________, which obtain both energy and carbon from ________
A) autotrophs; inorganic molecules
B) chemoautotrophs; decaying organic material
C) chemoheterotrophs; organic molecules
D) photoautotrophs; light
Answer: C
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Most known methanogens are nonhalophilic
A) psychrophiles. B) mesophiles. C) thermophiles. D) extremophiles (at either the psychrophilic or thermophilic end).
The ______________ of a species is usually the result of predation, competition, and other types of interaction between species
A. habitat B. fundamental niche C. realized niche D. abiotic environment E. resource partitioning
Giardiasis may be contracted from
A. another person. B. clear mountain streams. C. chlorinated city water. D. cold filtered beer. E. another person, clear mountain streams AND chlorinated city water
The vaginal ring
A) kills sperm. B) decreases testosterone production. C) blocks sperm from reaching the egg. D) prevents STDs. E) releases hormones that prevent ovulation.