The Nitrogenous Bases (And the Two Strands of the DNA

question 69

Multiple Choice

The nitrogenous bases (and the two strands of the DNA double helix) are held together by

• A) weak van der Waals forces.
• B) covalent bonds.
• C) hydrogen bonds.
• D) Both a and b
• E) Both a and c

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Definitions:

Crop-Lien System

A credit system used in the Southern United States after the Civil War, where farmers borrowed against the value of anticipated crops, often leading to debt and sharecropping.

Late Nineteenth-Century

A period typically considered to span from the end of the Civil War in 1865 to the beginning of the 20th Century, marked by industrialization, urbanization, and significant social and technological changes.

White Yeoman Farmers

Independent and often self-sufficient farmers in the Southern United States who owned their own land and did not have enslaved people working for them.

Sharecroppers

Farmers who rent land for cultivation and pay a portion of their crops as rent, prevalent in the southern United States after the Civil War; typically involved exploitative agreements.