Why is a genetic explanation for altruism problematic?
a. Only non-human animals exhibit altruistic behaviors.
b. Altruistic behaviors rarely benefit the individual performing them.
c. Altruism is more common among the young than among adults.
d. No behavior has been linked to any genes.
Question 2
Compared to young adults, aging humans with poor working memory have ____ activity in the prefrontal cortex and aging humans with intact working memory have ____ activity in the prefrontal cortex.
a. decreased; decreased
b. increased; increased
c. increased; decreased
d. decreased; increased
Four types of cellular responses to positional information in animals.
6 day old human embryo
Drugs and Human Behavior
Inside of the Human Immunodeficiency Virus (HIV)
Structure of the human immunodeficiency virus (HIV).
Posterior view of muscles of the human body