4/23

We discussed 4 simple invertebrate phyla (Porifera, Cnidaria, Platyhelminthes, and Nematoda) on Monday, and students were able to see video clips of them "in action." On Tuesday, we did an observation lab in order to review what we had learned. In this lab, students were able to identify and view hydra, planaria, sponges, coral, flatworms, roundworms, and jellyfish. On Wednesday, students did a Porifera (sponge) lab. Students conducted an experiment to see whether natural or artificial sponges held more water. Our class results varied quite a bit! Every natural sponge is a bit different, so it isn't surprising that our results were not consistent throughout the day. We took our simple invertebrate quiz on Friday. Next week, we will focus on mollusks and annelids (segmented worms).