Bozeman Science
Homeostatic Evolution
Paul Andersen shows how homeostasis reflects of evolution through time. The endocrine system shows continuity through flatworms, earthworms and vertebrates. However the respiratory system shows change as organisms move onto land. The...
Curated Video
Understanding Movement of Matter through the Ecosystem
In this video, the teacher explains how matter is constantly recycled in ecosystems. She shows examples of how matter moves from plants to animals, and from one organism to another through consumption. She also discusses the role of...
Curated Video
What is an Ecosystem?
An ecosystem is a complete community of living organisms and the nonliving materials of their surroundings. This includes plants, animals, microorganisms and their environment, such as soil, rocks, and minerals. An Ecosystem also...