Noah's teachers don't think that Noah is very smart, so they stop paying attention to him or asking him questions. After a few years, Noah decides there is no point trying to do well in school because he's dumb. He has become a victim of

Fraternal twinning occurs __________

A) less often with each additional birth B) more often among women with poor diets C) more often among women of slight body build D) more often among women whose sisters gave birth to fraternal twins

Schizophrenia runs in Alan's family. Before he was born, his mother abused alcohol. His birth was long and difficult. He is showing signs of impaired perception and judgment. Based on the __________ model, Alan is at high risk for exhibiting schizophrenia

a. biological c. psychodynamic b. learning d. cognitive