Positive psychology
?
Are some people happier
than others?
Social
psychology
?.
Does exercise improve
brain function?
Cognitive
psychology
?
How do our thoughts
affect our feelings?
Biopsychology
?
What are the roots of
prejudice?
Developmental
psychology
?
How does television affect
babies' ability to learn
language?

Aresearcher lyses a cell that contains nucleic acid molecules and capsomeres of tobacco mosaic virus (tmv). the cell contents are left in a covered test tube overnight. the next day this mixture is sprayed on tobacco plants. we expect that the plants would ) develop some but not all of the symptoms of the tmv infectionb) develop the typical symptoms of tmv infectionc) not show any disease symptomsd) become infected, but the sap from these plants would be unable to infect other plants