The evolution of animals is marked by six key transitions in body plan:
1. Tissues
2. Bilateral symmetry
3. Body cavity
4. Segmentation
5. Molting
6. Deuterostome development
Link to Lecture Slides: https://drive.google.com/open?id=1OppWPAlHUWDcmQb9UGppHy-foxRWivaB
*Due to the description character limit the full work cited for "Animal Phylum Key Transitions" can be viewed at... https://drive.google.com/open?id=13IXky-mjj7bJaGOCieCXnIRUeco9DIVF
