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Image of a planarian with two heads from the activity

Why Two Heads?

This activity explores images of planarians regenerating missing body parts, which serve as phenomena for learning about cell division and differentiation.

Cell Biology
Anatomy & Physiology
Phenomenal Images
High School — General
High School — AP/IB
Carbon Dioxide Concentration graph from Mauna Loa Observatory Hawaii

Trends in Atmospheric Carbon Dioxide

This activity analyzes a figure showing the atmospheric carbon dioxide concentration from 1958 to 2023.

Environmental Science
Earth Science
Science Practices
Data Points
High School — General
High School — AP/IB
College
Diagram from the activity

Earth Systems Activity

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

Environmental Science
Earth Science
Lessons
High School — General
High School — AP/IB
College
Image of a pipet drawing up a planarian

Investigating Planarian Behavior and Regeneration

This activity allows students to observe their own planarian and then design an experiment to investigate how planarians regenerate. It supports viewing of the video Identifying Key Genes in Regeneration.

Cell Biology
Anatomy & Physiology
Science Practices
Labs & Demos
High School — AP/IB
College