Suppose a small river with a population of 10000 frogs becomes polluted with cadmium to a level of 3 mg per gallon per day, about how many bullfrogs would be expected to die? a) about 3,000 b) about 7,000 c) about 8,500 d) about 1,500

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?