why do myelinated axons of frog having diameter of 3.5um conduct impulse at 30m/s whereas axons of same diameter in cat conduct impulses at 90m/s​

Which flexible structure that supports the nerve cord and led to the backbone

List five ways we are indebted to phytoplankton

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?