1. Slide
60 seconds
Evidence for Universal Common Ancestry in the Fossil Record
Why are there gaps in the fossil record?
2. Slide
60 seconds
Big Idea: Evidence for evolution in the fossil record
Agenda: 5/3 + 5/5
3. Open question
210 seconds
Review: How do new species form?
4. Word cloud
60 seconds
Word Cloud: Where can we find evidence of species forming this way?
5. Slide
60 seconds
"Why then is not every geological formation and every stratum full of such intermediate links? Geology assuredly does not reveal any such finely graduated organic chain; and this, perhaps, is the most obvious and gravest objection which can be urged against my theory. The explanation lies, as I believe, in the extreme imperfection of the geological record." Charles Darwin, 1859 - On the Origin of Species , p. 280
6. Open question
180 seconds
What are fossils? What information can they provide scientists?
7. Slide
60 seconds
A fossil is the preserved remains, impression, or trace (records of activity, such as nests or fecal matter) of any organism from a past geological age. Fossils can provide scientists with information about morphology, behavior, distribution, time period, diversity, trophic structure, and even DNA
8. Slide
60 seconds
9. Personalised Feedback
240 seconds
Darwin stated that the fact that we don't have many examples of the intermediate forms of species predicted by natural selection is one of the greater arguments against the theory of evolution by natural selection, but that he considered this a limitation inherent to the fossil record, not a problem with his theory. What are some of the reasons these "gaps" in the fossil record exist?
10. Slide
60 seconds
Transitional Fossils: Tiktaalik
Evidence for Universal Common Ancestry in the Fossil Record
11. Personalised Feedback
270 seconds
Review: Why might an organism like a jellyfish be a particularly rare find in the fossil record?
12. Slide
60 seconds
Big Idea: Evidence for evolution in the fossil record
Agenda: 5/3 + 5/5
13. Open question
540 seconds
Observe the skull and body of the fossil Tiktaalik: What do you notice about its characteristics? Share anything that stands out to you.
14. Slide
60 seconds
Tiktaalik is an organism whose fossil was located in the Canadian arctic by Neil Shubin, Edward Daeschler, and Farish Jenkins in 2006 The Tiktaalik is a "transitional fossil" Tiktaalik helps explain the transition of animal life from aquatic environments onto land
Transitional Fossil: Tiktaalik
15. Slide
60 seconds
Tiktaalik is just one example of something called a
What are Transitional Fossils?
16. Personalised Feedback
360 seconds
Tiktaalik did not live on land, yet it had many features that terrestrial vertebrates alive today have. How can we explain those features? Were they adaptations? If so, what might they have been adaptations for?
17. Slide
60 seconds
Learn more about Tiktaalik by watching the short documentary embeded below:
Made with ❤️ from Norway