BISC 1404- Midterm Exam Guide - Comprehensive Notes for the exam ( 24 pages long!)
12 Oct 2017
School
Department
Course
Professor
Document Summary
What are choanoflagellates: choanoflagellates- similar to collar cells in sponges, similar to protists, have similar cadherin proteins like in animals. Triploblastic- have a body derived from three embryonic layers (ectoderm, mesoderm, endoderm. Ecdysozoans molt exoskeletons or cuticles whereas lophotrochozoans do not. Chapter 33: an introduction to invertebrates: porifera, cnideria, platyhelminthes, mollusca, annelida, nemotoda, arthropoda, Caco3: annelida- have metameres, nemotoda- have cuticle to molt, pseudocoelomates, no circulatory system, arthropoda- have exoskeletons made of protein and chitin, jointed appendages. Chapter 34: the origin and evolution of vertebrates. Chapter 40: basic principles of animal form and function. What is the difference between direct and internal exchange: direct exchange- every cell is in contact and exchanging with the environment. Electrical impulses- cell signalling in neurons, very fast response. Endotherm- heat is produced internally by metabolic processes. Ectoderm- heat is provided by outside environment: homeotherm- relatively constant body temperature, poikilotherm- body temp varies with environment.
