Only certain types of physical activity help to develop physical fitness.

According to Sigmund Freud, defense mechanisms are necessary for psychological well-being.

a. true b. false

When a child is conceived, the egg and sperm cell join to create a complete genetic map of everything that baby will become. This "genetic blueprint" that determines our lifelong traits and characteristics is called a __________

a. karyotype b. phenotype c. genotype d. chromotype