The development of machines to do simple and not so simple tasks, such as robotics and computers, has had many influences on society. Some of these have been positive and some of them negative. Which statement describes a negative aspect of mechanical technological advances? A) fewer available jobs
B) lower prices for goods
C) less waste in production
D) lower cost of manufacturing

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?