Answer the following (2 pts each) 1. which of the following describes the dimethyloxytrityl (dmt) group? a. it is a chemical blocking group that is easily removed from the 5’oh by trichloroacetic acid (tca) b. during the chemical synthesis of dna, nucleotides are added in the 3’  5’ direction, therefore the 3’oh of an incoming nucleotide must be activated, but the 5’oh must be blocked c. its strong orange color can be optically measured to approximate the efficiency of dmt removal d. b and c only e. all of the above g

What best describes the structure of the declaration of independence?

This map shows how climate change might affect precipitation patterns in the great plains of the united states by the end of this century. brown shoes a decrease in percipitation, and blue shows an increase. the maps differ based on the predictive levels of green house emissions. the maps shows that northern area should get a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels.southern areas show a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels.to use these maps to prepare for natural disasters in the great plains, scientist need to ask? a. how many tons of emissions were used at the basis of the map.b. which types of fossil fuels are used in the great plains c. if you think the above is wrong it's probly c the question is cut off

Ascientific idea becomes valid when it is what?