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(1823-1913) Developed a theory of evolution almost identical to Darwin's, at almost the same time that Darwin developed his theory.

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III (a+b)(a-b) = a2-b2This is one of the recycled quadratics - also known as the difference of squares. It is GMAC's favorite, and appears in many questions in either of its forms. Whichever of the above forms you encounter in a GMAT problem, changing the quadratic into the other form will usually set you on the right path to solving the problem quickly. The trick lies in identifying the recycled quadratic in both its forms:1) Factored form: (a+b)(a-b)a. Identification:Two sets of parentheses, one with the sum of two terms, the other with the difference of the same two terms. Example:(x+5)(x-5)b. First step to solution: change the form: turn it into expanded form - square a and b, and subtract the square of b from the square of a. Check that it works using FOIL:(x+5)(x-5) = x·x + x·-(5) + 5x + 5·(-5) = x2-52 = x2-25

A nurse is reinforcing teaching with a group of guardians about primary prevention techniques. Which of the following topics should the nurse include as an example of primary prevention?

As illustrated by the passage, which of the following best explains the persistence of slavery in some parts of the Americas into the late nineteenth century?ResponsesAUrban middle-class families increasingly relied on the labor of slaves as more women joined the workforce.BCash-crop plantation agriculture remained an important part of some nations' economies.CConstitutions in the Americas continued to expressly deny citizens the legal rights that had long been established in Europe.DRailroads, steamships, and other technologies greatly facilitated new migration to the Americas.

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