CLEP Study Guide 2026

Explanation: Medieval, Renaissance, Baroque, Classical, Romantic, and 20th century is the historical eras of Western music in chronological order. The term "Gregorian" describes a kind of Capella liturgical music popular during the medieval era. The Baroque era saw the invention of the musical genre known as opera. A popular style of painting during the Romantic musical era was expressionist. Music that lacks a central note, or key, became popular in the 20th century.

The pancreas produces insulin to regulate blood sugar levels.

Penicillin inhibits transpeptidase enzymes that cross-link peptidoglycan in bacterial cell walls, causing osmotic lysis of growing bacteria.

Variable-ratio schedules deliver reinforcement after an unpredictable number of responses, producing the highest response rates and greatest resistance to extinction — similar to gambling.

Refraction is the bending of light as it changes speed between media.

During prophase I, homologous chromosomes undergo synapsis facilitated by the synaptonemal complex, forming bivalents (each consisting of four chromatids).