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This interactive module introduces the anatomy of the immune system and walks through the timeline of a typical immune response.

This interactive module explores how different animals — elephants, birds, and bats — have evolved distinct ways of using sound to communicate.

This interactive module traces the evolutionary history of birds by comparing the bone structures of a chicken to those of other species.

This interactive module explores the circulatory systems of major vertebrate groups to gain insights into their evolution.

This interactive module shows how DNA sequences can be used to infer evolutionary relationships among organisms and represent them as phylogenetic trees.

This interactive module allows students to compare the morphological characteristics of seashells and construct an evolutionary tree.

This tutorial describes the symbiosis between the Hawaiian bobtail squid and bioluminescent bacteria.

This interactive, modular lab explores techniques for identifying and recording the electrical activities of neurons, using the leech as a model organism.

This interactive, modular lab explores how the ELISA method can be used to test blood samples for evidence of certain diseases.