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Exploring Biomass Pyramids

This interactive module allows students to collect and analyze data from a virtual river to construct biomass and energy pyramids.

Exploring Trophic Cascades

This interactive module explores examples of how changes in one species can affect species at other trophic levels and ultimately the entire ecosystem.

Tissue Regeneration in Animals

This tutorial describes how animals differ in their abilities to heal wounds and regenerate lost body parts or damaged tissues.

How The Body Uses Fat

This tutorial explores how fat is digested, transported, stored, and used for energy.

Molecular Structure of Fat

This tutorial describes the various forms of “fat” — from a tissue, to a cell type, to a class of molecules.