Normal trade winds push warm surface water away from the coast of South America. This water is replaced by other sea water in a process called upwelling. Upwelling results in:

Which term best describes a community in which people work mostly in factories? a. agricultural. b. hunting and gathering. c. domesticated. industrial.

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Which of the following describes what an activator an enhancer are