| Concepts | Questions | Media Resources |
30.1 Evolutionary Trends Among Animals - Animals are multicellular heterotrophs exhibiting at least some mobility.
- Animals are grouped according to level of organization, symmetry, body plan, pattern of embryonic development, and presence or absence of segmentation.
| - What is cephalization?
Answer
- How do protostomes differ from deuterostomes?
Answer
- What ancestor gave rise to all animals?
Answer
| Essential Study Partner
Characteristics Art Quiz
Animal Kingdom Phylogeny Animation Quiz
Symmetry in Nature |
30.2 Introducing the Invertebrates - Sponges are multicellular, with limited mobility and no symmetry.
- Cnidarians are radially symmetrical, with two tissue layers.
- Planarians are bilaterally symmetrical, with a definite head region.
- Roundworms have a pseudocoelom and the tube-within-a-tube body plan.
| - What level of organization is exhibited in the sponges? In the flatworms?
Answer
- What two anatomical features are present in the roundworms that are not present in sponges, cnidarians, or flatworms?
Answer
| Essential Study Partner
Sponges
Radial Phyla
Bilateral/No Coelom
Pseudocoelomates Art Quizzes
Cnidarian Body Plan
Body Plans for Bilaterally Symmetrical Animals |
30.3 Molluscs: Coelomates - Molluscs have a muscular foot (variously modified), and a visceral mass enveloped by a mantle.
| - What two significant evolutionary advances are seen in the molluscs?
Answer
- Bivalves exhibit an open circulatory system. How does an open circulatory system differ from one that is closed?
Answer
| Essential Study Partner
Molluscs Art Quiz
Mollusc Body Plan |
30.4 Annelids: Segmented Worms - Annelids are segmented, with a well-developed, true coelom.
| - What evolutionary advancement is evident for the first time in the annelids?
Answer
- What specialization that resulted from the tube-within-a-tube body plan is seen among the annelids?
Answer
| Essential Study Partner
Annelids |
30.5 Arthropods: Jointed Appendages - Arthropods have jointed appendages and an exoskeleton that must be periodically shed.
| - Why are arthropods, especially insects, so successful and abundant?
Answer
| Essential Study Partner
Arthropods Art Quizzes
Insect Structure – Internal
Decapod Crustacean – Lobster
Metamorphosis Case Studies
Cicada Woodstock
Mosquito Coast |
