BIOL 102 Study Guide - Midterm Guide: Symmetry In Biology, Diploblasty, Triploblasty
Document Summary
Increase in cephalization > increases specialization tissues in embryonic development > define animals. Diploblastic: animals that have only two germ layers (endoderm inner layer, ectoderm outer layer) Chromates dominate: deuterostome>eight cell stage>indeterminate>folds of archenteron(form coelom) anus, animal phylogeny based mainly on morphological and developmental comparisons, within a phylum, body plans are similar, but forms are diverse, feeding strategy, movement strategy, and environmental selective forces! Chapter 33: an introduction to invertebrates: definition: mr. leuebner . Phylogeny evolutionary historical map : porifera: animals in this phylum are informally called sponges. Sponges are sessile animals that lack true tissues. They live as suspension feeders, trapping particles that pass through the internal channels of their body. Parasitic trematode flukes with multiple hosts; sophisticated immune system masking: platyhelminthes: flatworms (including tapeworms, planarians, and flukes) have bilateral symmetry and a central nervous system that process information from sensory structures. They have no body cavity or organs for circulation.
