A bacterial species that can grow when supplied an energy source and carbon source consisting of H2S and CO2, respectively, would correctly be considered: A. a hydrogenotroph B. a chemoautotroph C. a lithotroph D. two of the above are correct E. A, B, and C are all correct

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)