Title: week 7 overview
Course: BIO-182 RTZ > Section: week 7 - Evolution of Animal Body Plans

Image caption: cc by sa

TO DO before [Date/Time selected here]:

- Read Chapter 31 (Animal Origins & the Evolution of Body Plans)
- Complete: LaunchPad Learning Curve (Chapter 31)
- Complete: LaunchPad LEarning Activites (Chapter 31)
- Complete: Exam #2 (all parts)
- Optional: LaunchPad Summary Quiz

CHAPTER OVERVIEW:

Chapter 31 - Animal Origins & the Evolution of Body Plans. This week, we begin our examination of the diversity and evolution of animals. Chapter 31 provides an overview of the origin of animals and the evolution of body plans.

- The first section of this chapter (31.1) describes the traits that distinguish animals from other organisms. Animals are multicellular, heterotrophs that digest their food internally. They are able to move about at some point of their life cycle and have nervous systems. Although this is true for the vast majority of animals, you will see that their are exceptions. The section goes on to describe the developmental patterns that distinguish one group of animals from others. Read this section carefully focusing on the information that would allow you to answer the questions in RECAP 31.1 (pg 634).
- The following section (31.2) describes the features of the animal body plans. A body plan is the basic structure of a animal -hos it is arranged both internally and externally. The different body plans are differentiated based on 5 key features: symmetry, arrangement of the body cavity, segmentation, presence and arrangement of external appendages, and the development of a nervous system. Read this section carefully. Be sure you are able to answer the questions in RECAP 31.2 (pg 637).
- Section 31.3 describes the various means by which animals obtain nutrition. Read this section, Again, make sure you are able to answer the RECAP questions on page 639.
- Section 31.4 describes the life cycle of animals. In general, animals exhibit either direct development - in which the young resemble the adults, or indirect development - in which animals undergo metamorphosis as they develop from a larva to an adult. Skim this section.
- The final section (31.5) rounds out the chapter, providing a brief overview of the major groups of animals. Although you should be familiar with the major traits of each, you may skim this section.

SUPPLEMENTAL MATERIAL:  Note that reading/viewing these materials are completely optional, although you may find some of them interesting and/or helpful.

- EARLY EVOLUTION OF ANIMALS

http://www.youtube.com/watch?v=TQyO3AHKTrs

- OVERVIEW OF THE ANIMALS (Bozeman Biology)

http://www.youtube.com/watch?v=wd-QnKlfZHI

- SPONGES!!!  These animals are SO very cool!

http://www.youtube.com/watch?v=m8a0oNsDEx8

- ANIMAL LIFE CYCLES

http://www.youtube.com/watch?v=_VHQZn9zDG8

- ANIMAL DIVERSITY
  - Sponges and Cnidarianshttp://www.youtube.com/watch?v=DuQcmpHZ9tQ