Biology 26

Previous ………. Next Topic >

Adaptations & Natural Selection

Topic (26) Evaluate claims about ecosystem stability vs change related to ecosystem change. (HS-LS2-6)

An adaptation is a trait or behavior that helps an organism survive and reproduce. Traits are genetic differences that occur in a species. Traits are developed as a species adapts to its environment.


Day 1 – Introduction
Day 2 – Virtual Textbook

5:23 Five fingers of evolution – Paul Andersen

3:02 How do ecosystems change over time? (Ecological Succession)

2:59 Why Did T Rex Have Such Tiny Arms?



Instructor Resources

Standard Daily Material
  • Day 1 – Standard material – introduction day
  • Day 2 – Standard material – reading day
  • Day 3 – Standard material – make a presentation
  • Day 4 – Standard material – give a presentation
  • Extra! – Enrichment and remediation options
Other Topic Specific Resources

Special Notes and Notices

Instructor Emphasis:

  • Science & Engineering Practice: Ask questions and define problems.
  • Cross-Cutting Concept: Stability and Change.

Emphasize HS-LS2-6  Evaluate the claims, evidence, and reasoning that the complex interactions in ecosystems maintain relatively consistent numbers and types of organisms in stable conditions, but changing conditions may result in a new ecosystem.

About us ……… Terms of use