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Red Tattoo

This activity explores an image of tattoo ink particles inside cells, which serves as a phenomenon for learning about the structure and color of human skin.

Understanding Global Change

This interactive module allows students and educators to build models that explain how the Earth system works. The Click & Learn can be used to show how Earth is affected by human activities and natural phenomena.

Cystic Fibrosis Mechanism and Treatment

This animation shows how mutations in an ion channel protein lead to the genetic disease cystic fibrosis. The animation also discusses how research on this protein has been used to develop treatments for the disease.

Root Movement

This activity explores images of plant cells and structures, which serve as phenomena for learning about how plants respond to stimuli.

How We Get Our Skin Color

This animation describes how skin color is generated by skin cells as protection against ultraviolet (UV) radiation.

Earth Systems Activity

This activity guides students through building a conceptual model of how carbon dioxide affects Earth’s climate.

HIV Life Cycle

This animation shows how HIV infects a cell and replicates itself using reverse transcriptase.

Ubiquitin and the Proteasome

This animation shows how proteins in the cell are tagged for disposal by ubiquitin and then degraded by the proteasome.