A, sodium.....................................
1) Technique B
2) Because it preserves the harmless insects and targets only moth larvae
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Liquid 1 and 4, because they have the same melting point and density.
Gel electrophoresis separates fragments on the basis of weight and electric charge. Heavier and/or positively charged fragments don't go as far as lighter and/or negatively charged ones.
The comparison and contrast between the raft and the shore has something to do with freedom. On the river, Huck and Jim are free from the legal, societal and cultural structures which is the opposite if they were on the shore. However, their freedom on the raft was only for a short period of time. When<span> they went back on the shore, they were once again forced to comply with the </span>laws. The<span> similarities between the raft and the shore </span>are<span> natural. They are both are connected with geographical features.</span><span> </span>