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

This interactive module allows students to use DNA profiling and related biological concepts to solve two cases of elephant poaching.

A number of questions are embedded within the short film Popped Secret: The Mysterious Origin of Corn, which explores the genetic and archaeological evidence that corn was domesticated from a wild Mexican grass called teosinte.

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 tutorial describes the principles of DNA sequencing and sequence assembly, and shows how they apply to different sequencing techniques.

This tutorial describes how DNA microarrays called Virochips are designed to detect known viruses and discover new ones.

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

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

This short tutorial explores and compares the mechanisms of artificial selection and natural selection.

This tutorial explains how scientists analyze and interpret the large data sets generated by DNA microarrays.