This activity explores images of tree growth in the Serengeti over time, which serve as a phenomenon for learning about and modeling species interactions in ecosystems.
In this phenomenon-driven activity, students investigate how cells are signaled to make melanin and explain how mutations in melanin pathway proteins affect the coat color of various organisms.
Cell Biology
Genetics
Lessons
High School — General
High School — AP/IB
College
Canine Conservationists
Release Date
Duration 00:27:51
Dogs are sniffing out dwindling populations of koalas and helping scientists eliminate invasive foxes that devastate native sea turtle populations.
Salamander of the Gods
Release Date
Duration 00:27:51
Scientists and farmers in Mexico City are working together to conserve the axolotl. Another team is partnering with salamander-breeding nuns to save a closely-related species—the achoque.
In this activity, students use an interactive tool to simulate how scientists collected and used sample data to estimate elephant population sizes.
Ecology
Environmental Science
Science Practices
Click & Learn
High School — General
High School — AP/IB
College
Beaver Fever
Release Date
Duration 00:27:48
The return of beavers to the British countryside is boosting biodiversity, reducing storm-induced flooding, and restoring wilderness to an over- manicured landscape.
In this inquiry-based activity, students engage in science practices to figure out why some people with a genetic condition that usually leads to sickle cell disease do not have disease symptoms.
This animation shows two examples of how the cell uses energy from ATP. It is the sixth of six animations about cellular respiration. These animations bring to life the molecular engines inside mitochondria that generate ATP, the main source of chemically stored energy used throughout the body.
This animation shows how the pyruvate dehydrogenase enzyme complex converts pyruvate into acetyl-CoA. It is the second of six animations about cellular respiration.
This animation shows how glycolysis converts glucose into pyruvate through a series of enzyme reactions. It is the first of six animations about cellular respiration. These animations bring to life the molecular engines inside mitochondria that generate ATP, the main source of chemically stored energy used throughout the body.