The main product of photosynthesis used by plants is
A. glucose
B. oxygen.
C. carbon dioxide
D. chlorophyll.
E. sunlight.
A. glucose
Biology & Microbiology
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According to the geological time scale, which segment of Earth’s history is the oldest?
a. Hadean eon b. Archean eon c. Proterozoic eon d. Paleozoic era e. Cenozoic era
Biology & Microbiology
The production of cyclic AMP in Dictyostelium results in ____
a. sexual reproduction b. cell division c. swimming d. spore production e. aggregation of cells
Biology & Microbiology
All of the following are respiratory surfaces EXCEPT for
A) tracheae of a fly. B) alveoli of dogs. C) skin of earthworms. D) air sacs of birds. E) gills of fish.
Biology & Microbiology
Unlike bacteria, viruses:
A) are unable to replicate. B) are treated effectively with antibiotics. C) do not produce an immune response. D) do not produce exotoxins or endotoxins.
Biology & Microbiology