Match the term on the left with its definition or description on the right.
A) energy from carbon, carbon from sunlight
B) electron donor is water
C) energy from sunlight, carbon from organic sources
D) electron donor is carbon dioxide
E) energy from sunlight, carbon from CO2
F) light-dependent generation of NADPH
G) use electron donors such as sulfide and thiosulfate
1) photoreduction
2) photoheterotrophs
3) photoautotrophs
4) oxygenic phototrophs
5) anoxygenic phototrophs
1) F) light-dependent generation of NADPH
2) C) energy from sunlight, carbon from organic sources
3) E) energy from sunlight, carbon from CO2
4) B) electron donor is water
5) D) electron donor is carbon dioxide
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The half-life of carbon-14 is 5730 years. Approximately how old is a fossil that contains .25g carbon-14 and .75g nitrogen-14?
A. 11,460 years B. 5730 years C. 17,190 years D. 22,920 years E. 28650 years
Of the amoebozoans, which species spend their entire lives as single cells?
a. all slime molds b. cellular slime molds c. plasmodial slime molds d. amoebas e. spore-bearing fruiting bodies
The lumen of capillaries is so small that red blood cells must travel through these blood vessels in single file or sometimes actually squeeze through
Indicate whether the statement is true or false
If you were told that concentrations of trace elements, above what is required by organisms, generally have no effect on those organisms, what would you say?
a. true b. false