The most fundamental grouping in the classification of living organisms is the ____
a. family
b. genus
c. order
d. species
e. class
d
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Photosynthesis probably originated during the __________ era, and most likely used _____________ as an electron donor.
A. Proterozoic; hydrogen sulfide B. Paleozoic; water C. Proterozoic; water D. Archean; water E. Archean; hydrogen sulfide
Yeasts are
A. multicelled heterotrophs. B. All of the answer choices are correct. C. single-celled autotrophs. D. single-celled heterotrophs. E. multicelled autotrophs.
Volume increases by the __________ of the
diameter, and surface area increases by __________ of the diameter. a. square; doubling b. square; the cube c. cube; the square d. cube; the cube e. none of these
Mitochondria arose by endosymbiosis of ______.
A. an anaerobic bacterium B. a photosynthetic bacterium C. an aerobic bacterium D. an aerobic archaeon E. a photosynthetic archaeon