Very often, carbon is absorbed by more than one reservoir. for example, carbon released in the smoke from industrial pollution is initially absorbed by the atmosphere, but also by the oceans eventually. in this activity, identify the first reservoir of carbon absorption for the given activities and processes. drag the appropriate items to their respective bins. if you feel that an item is applicable to more than one bin, sort it into the most appropriate bin.

Assume that you are interested in separating short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range. you have two recipes for making your polyacrylamide gels: one recipe uses 1.5 percent agarose and would be considered a “hard gel,” while the other uses 0.5 percent agarose and would be considered a loose gel. which gel should you use to separate the short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range?