ZOO 2700 Study Guide - Final Guide: Crustacean, Xenacoelomorpha, Nautiloid
Document Summary
Major larval types known for cnidarians, molluscans, ecdysozoans, deuterostomes (see uploaded document) Mouth parts sunk in a depression on the head. Lack flight & efficient mechanisms for avoiding desiccation. Mouthparts not recessed in a pocket, compound eyes & ocelli: neoptera can flex their wings over their abdomens. Can fold wings flat over the abdomen (not dragon flies, damsel flies, mayflies : holometabola immatures and adults are morphologically and ecologically very different. Permits resource partitioning, avoidance of competition, & specialization for different but complementary roles in the life cycle. Short answer questions by students: three major adaptations seen in invertebrates are holometaboly, eusociality, and communication. Define each term, identify at least one invertebrate taxon in which it appears, and describe how it is advantageous. Describe some apomorphies that would unite them and a common ancestor: compare the strategies used by parasites in the following taxa: acari, cestoda, nematophora and. Hirudinomorpha: differentiate between the feeding strategies of asteroidea, cephalopoda, porifera and scyphozoa.
