This art history video discussion examines Gian Lorenzo Bernini's "Bust of Medusa," marble, c. 1644-48 (Capitoline Museum).

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Biology 2e is designed to cover the scope and sequence requirements of a typical two-semester biology course for science majors. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology includes rich features that engage students in scientific inquiry, highlight careers in the biological sciences, and offer everyday applications. The book also includes various types of practice and homework questions that help students understand—and apply—key concepts. The 2nd edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Art and illustrations have been substantially improved, and the textbook features additional assessments and related resources.

By the end of this section, you will be able to do the following:

Compare structural and organization characteristics of Porifera and Cnidaria
Describe the progressive development of tissues and their relevance to animal complexity
Identify the two general body forms found in the Cnidaria
Describe the identifying features of the major cnidarian classes

This art history video discussion examines Benvenuto Cellini's "Perseus with the Head of Medusa," c. 1554, bronze (Loggia dei Lanzi, Piazza della Signoria, Florence).

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This art history video discussion examines Theodore Gericault's "Raft of the Medusa", oil on canvas, 193 x 282 inches, 1818-19 (Musee du Louvre, Paris).

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Fully comprehensive site that dives into world myths and world cultures. View art that expresses mythological themes from various cultures around the world and learn about cultural similarities and differences. Key words for learning, class discussion questions, background on the artwork, and the nature of the myth are included. Loads of information on creation myths, heroic myths, mythological creatures, and more.

Fun, illustrated trip through the story of Perseus from Greek mythology well suited for younger audiences. Each page summarizes part of the story along with a very eye-catching, animated illustration.