BIOL 1200 Midterm: Exam 4 Study Guide Part 2
Document Summary
What clade is the sister taxon to animals: choanoflagellates. What clade in animalia is the sister taxon to the remaining animals: porifera (sponges). Which are deuterostomes: protostomes: lophotrochozoa, ecdysozoa (arthropoda), deuterostomes: echinodermata, chordata. What were the first animals to make the transition from water to land: arthropods. What features allowed them to do so: exoskeleton (impermeability to water helped prevent desiccation and its strength provided support when they left water), jointed limbs, and the variation of specialized gas exchange organs. What is the water vascular system: bilaterally symmetric larva, but radially symmetric adults, a network of water vessels in the body, consists of external projections called podia, internal structures like pipettes called ampulla. Together, these make up the tube foot; these podia secure food in different ways. The vertebrata: chordata: dorsal hollow nerve chord, notochord, muscular post-anal tail, pharyngeal gill slits, vertebrata: presence of vertebral column.
