1 / 12

Changing Over Time

Changing Over Time. Rich Stein. Carolina: Inquiries in Science Series. Kit is set up for 6 groups Three Activities Activity 1: Students compared relatedness of species Activity 2: Homologous vs. Analogous vs. Vestigial Structures. Activity 3: Evolution of Antibiotic Resistant Bacteria

lovie
Download Presentation

Changing Over Time

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Changing Over Time Rich Stein

  2. Carolina: Inquiries in Science Series • Kit is set up for 6 groups • Three Activities • Activity 1: Students compared relatedness of species • Activity 2: Homologous vs. Analogous vs. Vestigial Structures. • Activity 3: Evolution of Antibiotic Resistant Bacteria • Cost: $149.95

  3. Instructional Approach

  4. Focus • Activities designed to help students study the evidence of evolution. • Homologous Structures: structures evolved from a common ancestor.

  5. Focus • Analogous Structures: Differ in form but are similar in function. Organisms adapted in similar ways.

  6. Focus • Vestigial Structures: Remaining components of structures that once served a function in an organism’s ancestor but useless today.

  7. Explore • Kinship Activity: Within each row list the species that does not belong. • 1: Raccoon • 2: Shark • 3: Sponge • 4: Toadstool • 5: Amoeba • 6: Leech

  8. Explore • Changing Over Time Structure Cards • Brainstorm with your group into how to organize your cards • Consider: • Function of structures • Shared structures • Shared functions

  9. Explore • Homologous Structures: • Pitcher plant, Venus flytrap, Red poinsettia, and cactus • Analogous Structures: • Human Legs and Spider Legs • Butterfly wings and bird wings • Vertebrate cranium and the anterior exoskeleton of beetles. • Vestigial Structures: • Hind bones of whales, wings of ostrich, Dandelion flower (ovules develop into seeds, no pollen needed)

  10. Explore • Activity 3: You’ll need • Luria Broth with E. coli • Pipet • Prepared ACG agar plate • “Ampicillin concentration gradient” • Write your group name • Pipet three drops of luria broth onto the ACG plate. • Let the plate sit for 10 minutes, then place into 37o incubator for 24 hours.

  11. Apply • You have at your disposal: • LB Agar Plates • LB Agar + Ampiciliin Plates • Blank sterile antibiotic disks • Design an experiment to test your hypothesis

More Related