Africa and South America, while thousands of miles apart today, have coastlines that look like they once fit together. Using what you know about plate tectonics, write a claim explaining what forces could have caused the separation of such large land
masses over time.
Write a 3 sentence claim using the following terms:
• plate tectonics
• crust
• magma

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?