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physical separation of members of a population (rivers/bodies of water)

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Sir Gawain and the Green Knight, AnonymousThen they showed him the shining scarlet shieldwith its pentangle painted in pure gold.He seized it by its strap and slung it round his neck;he looked well in what he wore, and was worthy of it.And why the pentangle was appropriate to that princeI intend to say, though it will stall our story.It is a symbol that Solomon once set in placeand is taken to this day as a token of fidelity,for the form of the figure is a five-pointed starand each line overlaps and links with the lastso is ever eternal, and when spoken of in Englandis known by the name of the endless knot.So it suits this soldier in his spotless armor,fully faithful in five ways five times over.For Gawain was as good as the purest gold—devoid of vices but virtuous, loyaland kind,so bore that badge on bothhis shawl and shield alike.A prince who talked the truth:known as the noblest knight.

Read the passage from Sugar Changed the World.Workers could not leave the plantation unless they had a pass. And if they did decide to explore on their own, without permission, they could be thrown in jail, sentenced to hard labor, or lose some of their hard-earned wages. A charge of "idling" in the fields could result in the loss of a whole week's wages. Worse, if they dared rebel or protest, their contract could be transferred to another estate. And there were still complaints of flogging or mysterious deaths. Life, as the historian Hugh Tinker noted, was like being a prisoner on parole.Which question does this passage answer most effectively?Who was Hugh Tinker, and what did he study?What did the Indians' contracts specify?What was life actually like for indentured Indians?What kind of work did the Indians do on plantations?

You have a population of clams with genotypes of 4 RR, 14 RS, and 6 SS. The allele frequency for R is ____ and____ of the clams have a resistant phenotype.

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