Aresearcher wishes to place electrodes in the brain so that existing motor activity can be used to control an artificial hand designed for amputees. the researcher should place the electrodes in the

The researcher should place the electrodes in the frontal lobe of the brain.  Since the goal of the researcher is to control an artificial hand for disabled people, the frontal lobe is the best place to set the electrodes because it controls the motor function of the body.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides