1 / 14

Evolutionary Discoveries and Insights: Tiktaalik, Archaeopteryx, and More

Explore fascinating evolutionary findings from Tiktaalik in Canada to the unique Antarctic Ice Fish genome and insights on human and animal biology. Learn about vestigial traits, guppy experiments, and antibiotic resistance in Staphylococcus aureus.

shalom
Download Presentation

Evolutionary Discoveries and Insights: Tiktaalik, Archaeopteryx, and More

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. Tiktaalik Tiktaalik Discovered in 2004 on Ellesmere Island, Canada. Fossil dated to 385-359 million years ago

  2. Archaeopteryx Fossil dated to 150 Million years ago

  3. Nostrils Source: evolution.berkeley.edu

  4. “Fossil” beta globin Scientists have discovered that The Antarctic Ice Fish (Chaenocephalus aceratus) does not have any red blood cells. Instead of transporting oxygen through their blood, they absorb oxygen from the water through their skin and large gills. Looks like a broken down beta globin gene Ice fish genome It is discovered that the ice fish genome contains a segment that looks like the beta globin gene found in closely-related fish, but is not functional.

  5. Human chromosome 2 Human chromosome 2 Looks like a centromere centromeres Chimp chromosomes 2q and 2p Humans have 23 pairs of chromosomes. All other ape species have 24 pairs.

  6. Vestigial parts • Humans have much smaller appendices than herbivorous animals. • In herbivorous animals, but not in humans, the appendix serves to aid digestion of plant material. • It is still unclear what function, if any, the appendix serves in humans. • Humans have a small immobile tail made up of four fused vertebrae. • In other primates, these vertebrae are not fused and allow the tail to move, aiding in balance and mobility.

  7. Guppy experiment #1 Initial observations: Scientists observe that male guppies that stand out from their surroundings attract more females evolution.berkeley.edu

  8. Guppy experiment #2 evolution.berkeley.edu

  9. Staphylococcus aureus • Bacteria commonly found on mucous membranes and skin • Can cause infections (Staph infections) • Penicillin introduced as antibiotic in 1940 • very effective against Staph in the early 1940’s • 95% of staph strains now resistant to penicillin • Many strains are now resistant to multiple antibiotics: penicillin, methicillin, tetracycline • MRSA: Methicillin-resistant Staphylococcus aureus

  10. Nested traits

  11. Comparing DNA

More Related