Every extra commercial you view adds one more positive memory of the product to your long-term memory, which increases your positive impression of the product, a process known as memory jamming

The principle of ____ suggests that physical properties of substances, such as volume, number, and mass, remain constant in spite of changes in their shape or appearance.

a. object permanence b. centration c. egocentrism d. conservation

Darwin and Mendel made great advances in our understanding of heredity, but it was

only in the 20th century that the basic, discrete unit of heredity was discovered. That unit is called a (a) Mendel (b) chromosome (c) gene (d) sperm