2. Which One of These Groups Is Least Like the Others?

Chapter 35 (Pt. 2): Leader: Julie Deuterostomes Course: Biology 211 Supplemental Instruction Instructor: Dr. Holscher Iowa State University Date: Test yourself. 1. T/F: Sea Urchins and Sand Dollars are more closely related to snails and barnacles than to fish. ______

2. Which one of these groups is least like the others? a. Echinodermata b. Annelida c. Arthropoda d. Mollusca e. flatworms

3. Which of the following is NOT true of members of the phylum Echinoderma? a. They are exclusively marine organisms b. most are bottom-dwelling creatures c. the adults are radially symmetric d. they have an exoskeleton e. they have a water vascular system

4. Which one of the following statements is FALSE concerning both chordates and echinoderms? a. both exhibit indeterminate cleavage in early development b. the embryonic blastopore becomes the anus in both c. both have true coeloms d. both exhibit radial cleavage e. both develop pharyngeal gill pouches and a dorsal hollow nerve cord.

I. Key innovations of the Cambrian Explosion: Name and Describe each 1. Vertebrate jaw  gills

2. tetrapod limb  swimming limbs to terrestrial limbs

3. amniotic egg  terrestrial, don’t need water

4. placenta  embryonic development

5. parental care  parents take care of young

6. wings and flight  lightweight bones

1060 Hixson-Lied Student Success Center v 515-294-6624 v [email protected] v http://www.si.iastate.edu II. Besides the Key Innovations we just listed, what are 4 other important changes that helped deuterostomes survive a terrestrial environment? 1.

III. Natural Selection = ______+ ______

IV. ______were the 1st vertebrates to live a portion of life on land.

V. Know the membranes of the Amniotic Sac.

VI. Describe the difference between Endothermic animals and Ectothermic animals.

VII. Name the 3 types of Mammals we talked about today in class and characteristics of each. 1.

-Include the Echindas and ______

-Include:

VIII. Chondrichthyes are interesting organisms. 1. They have ______skeletons 2. Their bodies are ______than water 3. And they include the ______, ______, and ______.

IX. What is one key difference between Rays and Skates?

X. Ray finned fishes have skeletons made of ______, can control their buoyancy with a ______, and live in ______habitats. XI. Amphibians and their clades 1. 2. 3.

XII. Reptiles have a kinetic skull. What does this mean?

XIII. What is the difference between Totoises and Terrapins?

XIV. Julie went on a field trip to the Swamp in New Orleans. How would the teacher describe the difference between a crocodile and an alligator?

XV. Primates! What are some characteristics?

XVI. Finally, what distinguishes Hominins from other primates?

Wrap-up. What is something you are still confused about/want to know more about?