Uwrf zoology Study guides, Class notes & Summaries

What animal characteristics do protozoans have? - No cell walls, eukaryotic, some are multicellular, some are heterotrophs How are protozoans able to carry out bodily functions in a single cell? - -possess organelles -some are autotrophs -possess all other animal characteristics What are two kinds of ASEXUAL reproduction that occur in protozoans? - Binary fission and schizogany (multiple fission) What is ASEXUAL reproduction in protozoans? - split off Any advantages to asexual reproducti...

3 germ layers - ectoderm, MESODERM, endoderm What does the mesoderm form? - True muscle tissue Acoelomate - no body cavity coelomate (eucoelomate) - True body cavity completely surrounded by mesoderm Pseudocoelomate - false body cavity symmetry of platyhelminthes - bilateral symmetry (first appearance) Platyhelminthes nervous system - -Anterior cerebral ganglion and nerve cords -Eyespots Platyhelminthes osmoregulation - Flame cells Simple diffusion Flame cells - In flatworms, specializ...

Animal - eukaryotic organism with no cell walls, multicellular, motile, and ingestion feeders development - progression of life stages primitive - taken along the way of evolutionary development holozonic - Whole food engulfing saprozoic - absorbing food monophyletic - group having a common ancestor, part of that group Protozoan similarity to animals - They lack cell wall, one motile stage in life, holozoic homeostasis - maintain internal environment osmoregulate - regulation of salt in ...