1. Your Inner Fish Chapter 4: “Teeth Everywhere”
Abbe Dembowitz
AP Bio
9/14/10

2. You might’ve thought that she introduced teeth to the world…
peelinganorangewithascrewdriver.blogspot.com
…but you were sadly mistaken…

3. The harder the tooth, the better the fossil
Rocks and teeth: preservation wise, they’re one in the same
“Bigger creatures into smaller pieces”
Eating Habits:
Carnivores- Sharp blades
Herbivores- flat, square
answers.com

4. Conodonts? Did you mean: condiments?
Fossils found in ancient oceans
“small shelly organisms with a series of spikes projecting out of them,” (75)
The lamprey
The evolved jaw and Trithelodont
Single root at base of tooth: reptile
Bumps and ridges- mammal
eeob.iastate.edu

5. “We would never have scales, feathers, and breasts if we didn’t have teeth in the first place,” (79)
cartoonstock.com
“The developmental tools that make teeth have been repurposed to make other important skin structures” (80)
Teeth: Development b/w layers of tissue in skin
Other: Development from the interactions b/w layers of skin
Acquiring of their prey

6. Take a look at your teeth…
Do they look like this?
..Introduce evolution and….
kent.ac.uk
whyfiles.org
faculty.ksu.edu.sa

7. Evolution over time 1. Little fish developed armor
tudorplace.com.ar
2.Big fish obtained bigger jaws to crack the armor
3. Competition arises and animals evolve
poptimal.com
checkyourodds.co.uk

8. Sources
Your Inner Fish by Neil Shubin, Vintage Books, Random House, New York, 2009 (Pgs )