to change the growth of plants or behavior of animals in ways that are useful for humans.

a person who moves from place to place without a permanent home.

a mountain range that runs along the western edge of South America.

a strip of level land cut into a mountain slope that is planted with crops.

something that is expected.

to help bring about.

record-keeping device made of knotted strings, used by the Incas.

system for ranking members of a group according to their importance.

in Incan society, a group of related families that pooled its resources to meet people's needs.

Incan system of payment of taxes with labor.

the result of multiplying one number by another.

to be accurate.

use of machines to do work that had been done by animals or humans.

a group of people who share a distinct culture, language, and identity.

long serial drama made for television.

parade held to celebrate the Rio Carnival.

depending on a variety of exports or products.

the power produced by water-driven turbines.

dependent on one another.

to sell government-owned businesses to private individuals and groups.

body of public works, such as roads, bridges, and hospitals, that a country needs a support a modern economy.

a location's rate of people able to read or write.

use of power for personal gain.

loss of forest cover that results from so many trees being removed that trees cannot grow back.

the area within which all countries can freely trade with one another.

a non-profit group that operates with private funding.

to convert text into a different language.

a program with many episodes issued over a period of time.

a person or thing that is excluded from a general statement.

to take in or soak up.

to work.

something that contributes to a development or result.

line set by the Treaty of Tordesillas dividing the non-European world into two zones, one controlled by Spain and one controlled by Portugal.

Treaty signed between Spain and Portugal in 1494 divided the non-European world between them.

natural defense against disease.

a tree found in tropical regions whose wood is valuable for the production of purple or red dye.

explorer and slave-hunter in colonial Brazil.

complete disorder and confusion

planned course of governmental action.