Phylum Porifera - Phylum Ctenophora - Phylum Cnidaria I. Phylum Platyhelminthes - Protostome development - Deuterostome development D. Endoderm, mesoderm and ectoderm - Class Cestoda G. Hydra and Medusa E. Coelomate Animal A. Comb Jellies B. Development in animal tissues where the anus develops first. C. Group of animals that consist of the Jelly fish and Hydra D. All are embryonic germ layers. E. have a body cavity called a coelom with a complete lining called peritoneum derived from mesoderm F. The basal lineage of all animals. Lack true tissues. G. are the two main body plans in the Phylum Cnidaria H. Organisms in this class are of the phylum platyhelminthes and are known as tape worms I. Organisms known as the flat worms. Animals in this group consist of the planaria and liver flukes J. Development in animal tissues where the mouth develops first.

With the description of the different cell walls, membranes, and associated proteins set in the students' minds, you now need to introduce them to the idea that the cell wall can also act as a foundation to build things upon. bacterial appendages require a strong foundation that will offer the support needed to move and function in a dynamic world. for example, flagella are long, whiplike protein structures that are used by many gram-positive and gram-negative bacteria for locomotion. in order to function effectively, a flagellum must be firmly anchored to the cell wall. how will you be able to get across the idea that the peptidoglycan cell wall is strong enough to support such a mechanism? with a protein rod that passes through the cell wall and protein rings used to anchor it in the membranes, these basal bodies are the rudimentary biological motors that use atp power to spin the hook and the flagella attached to it. bacterial flagella have a biological motor that spins within the cell wall and is powered by atp. this allows the flagella to spin in a whiplike motion to propel the bacterium.

Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.