How did the Inca civilization modify their environment to grow new crops? A. by digging deep wells to provide spring water
B. by damming rivers to provide water in nearby areas
C. by building irrigation canals to bring water from rivers
D. by creating artificial lakes to water their fields

Agroup of people who, because of their physical characteristics or cultural practices, are singled out and treated unequally.

According to ohrp, a problem is an “unanticipated problem” when it meets which of the following criteria: unexpected, related or possibly related to the research, suggests that the research does not put the subjects or others at greater riskunexpected, related or possible related to the research, suggests the research puts subjects or others at greater riskunexpected, unrelated to the research but still occurring with a subject, suggests the research puts others at greater riskexpected, related or possible related to the research, suggests the research puts others at greater risk

Drugs have a high potential for abuse. there is no routine therapeutic use for these drugs and they are not available for regular use. they may be obtained for “investigational use only” by applying to the u. s. drug enforcement agency. examples include heroin and lsd. which scheduled drug is this?