In a study comparing the genetic contribution to eating disorders, researchers found that in % of identical twin pairs both twins had bulimia nervosa, while that number was % of fraternal twin pairs. although this does not rule out the influence of environmental and sociocultural factors, it does present compelling evidence for a genetic contribution to these conditions.

Me ! which of the following is an environmental concern of genetically modified foods? a) crops that are drought resistant are introduced providing food regardless of the unpredictable weather b) reduction cost of production for the crops c) an important ingredient may be introduced in a strain of rice for the poor who depend on rice as a primary food d) toxic substances produced as a pesticide may be consumed by unintended species