Grade Level(s):
- 13-16
Source:
- Evo-Ed
Resource type:
- Case study
Time: 1 to 2 class periods
Overview
This case study in the form of a set of PowerPoint slides examines the evolution of toxin resistance in clams.
- [Evidence of evolution: Grades 13-16] An organism's features reflect its evolutionary history.
- [Evidence of evolution: Grades 13-16] There is a fit between organisms and their environments, though not always a perfect fit.
- [Evidence of evolution: Grades 13-16] There is a fit between the form of a trait and its function, though not always a perfect fit.
- [Evidence of evolution: Grades 13-16] Some traits of organisms are not adaptive.
- [Mechanisms of evolution: Grades 13-16] New heritable traits can result from mutations.
- [Mechanisms of evolution: Grades 13-16] Mutation is a random process.
- [Mechanisms of evolution: Grades 13-16] Organisms cannot intentionally produce adaptive mutations in response to environmental influences.
- [Mechanisms of evolution: Grades 13-16] Complex structures may be produced incrementally by the accumulation of smaller advantageous mutations.
There are no NGSS/DCI concepts currently linked to this resource.
This case study is also appropriate for zoology and ecology classes. The toxin resistance is quite interesting and should be engaging to a qualified student; however, background in cell membrane physiology should be a prerequisite.
This resource currently lacks an associated teaching background.