Define and describe in detail serial monogamy, serial polygyny, simultaneous polygyny, promiscuity with pair bonds, and promiscuity without pair bonds. define and describe in detail an epc. how does this differ from an extrapair mating? what is a lek, and why is that form of polygyny especially interesting to ethologists? be sure to provide sufficient detail and explanation in your substantive answer.

Which of the following statements best characterizes changes to agriculture in the united states since 1900? a. increased mechanization has reduced the need for labor.b. increased mechanization has increased the need for water, thereby increasing the need for labor.increased mechanization has increased the use of land, thereby increasing the need for labor.d. increased mechanization has increased food production, thereby increasing the need for labor. select the best answer from the choices provided.

What is most often given a value of zero to describe an object’s position on a straight line? displacement reference point distance ending location

What term describes the government positions that officials who passed the civil service exam became a part of?