13. the greek word karuon means “nut.” the prefix pro-
means “before," and the prefix eu- means “true.” thus,
prokaryote means “before nut," and eukaryote means
“true nut.” how do these meanings relate to structural
differences between these two cell types?

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the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation:

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