In __________ inheritance, a combination of multiple gene pairs is responsible for the production of a particular trait

A wide variety of stressful events have been found to ________ the functioning of the immune system and make people ________ susceptible to disease

a) heighten; more b) heighten; less c) suppress; more d) suppress; less

Memory for chess positions is influenced especially by

(a) prepared learning (b) spontaneous recovery in operant conditioning (c) prior learning (d) sensory memory