Your Inner Fish Chapter 4: “Teeth Everywhere” Abbe Dembowitz AP Bio

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Transcript Your Inner Fish Chapter 4: “Teeth Everywhere” Abbe Dembowitz AP Bio

Your Inner Fish

Chapter 4: “Teeth Everywhere”

Abbe Dembowitz AP Bio 9/14/10

You might’ve thought that

she

introduced teeth to the world… peelinganorangewithascrewdriver.blogspot.com

…but you were sadly mistaken…

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 bladesHerbivores- flat, square answers.com

http://sites.google.com/site/fossiliveraci english/meg,wehardlyknewye

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 TrithelodontSingle root at base of tooth: reptileBumps and ridges- mammal http://dobrinishte.org/fishes/ eeob.iastate.edu

“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 skinOther: Development from the interactions b/w layers of skinAcquiring of their prey

Take a look at your teeth…

whyfiles.org http://www.nhm.ac.uk/nature-online/species-of-the-day/evolution/index.html

Do they look like this?

..Introduce evolution and….

faculty.ksu.edu.sa kent.ac.uk

Evolution over time

1. Little fish developed armor 2.Big fish obtained bigger jaws to crack the armor tudorplace.com.ar

• 3. Competition arises and animals evolve POPTIMAL .

COM checkyourodds.co.uk

Sources

Your Inner Fish

by Neil Shubin, Vintage Books, Random House, New York, 2009 (Pgs. 60-80)