Which statement is an example of mutualism? a. bees sting other organisms when they sense danger. b. bees pollinate flowers while obtaining nectar. c. bees have black and yellow stripes that warn other organisms of danger. d. bees maintain an ecosystem’s native cacti species through pollination.

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?