All fossils fuels, including coal, are considered an indirect form of _______ energy.
A- renewable
B- geothermal
C- wind
D- nuclear
E- solar
D- Solar
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Which of the following organisms anaerobically reduces sulfates to hydrogen sulfide or metal sulfide?
A. Desulfovibrio B. Nitrosococcus C. Rhizobium D. Thiobacillus thiooxidans E. Thiobacillus ferrooxidans
Histone modification occurs only during early development
A. true B. false
Scientists now believe that comets falling to early Earth played a role in the evolution of life. What role did these comets play?
A) They brought CO2 and H2O. B) They brought ammonia ions (NH4). C) They generated a lot of energy when they hit Earth. D) All of the above are true.
Independent assortment refers to the fact that
A. a cell will divide and produce various offspring regardless of whether any other cell is dividing. B. mitosis normally produces cells that are like each other and like the parent cell. C. the daughter cell that receives the maternal #1 chromosome will not necessarily receive the maternal #2. D. a crossover between two chromosomes will produce offspring unlike either parent.