For the test, will I need to know the specifics of each animal phyla like whether they are sessile or motile, whether they have 2 or three cell layers, or do I just need to know the animals that correspond with the phyla like poriferas to sponges and nematodas to roundworms.
The animals can be classified into two
1-Redical
2-Bilateral
bilateral symmetry have equal arrangement of parts (symmetry) about a vertical plane running from head to tail
radial symmetry is a form of symmetry wherein identical parts are arranged in a circular fashion around a central axis
Bilateral Have three cell layer while redical have 2 cell layer… For each phylum it is important to know: General features and the classification of one member species. As you go through each phylum, try to relate the structures with the functions.
For example: Platyhelminths - these are flatworms. They are thin, but have a large surface area. This means that they can obtain oxygen and food by diffusion from the external environment. Therefore they need no lungs, no gills, no specialised gut, and no circulatory system.