PPT-  coelom evolution Dr.M.Deivanayaki

The  coelom  allows for compartmentalization of the body parts so that different organ systems can evolve and nutrient transport is possible Additionally because the  coelom  is a fluidfilled cavity it protects the organs from shock and compression Simple animals such as worms and jellyfish do not have a . Welcome to Discovery Education Player. Characteristics of flatworms. Soft, flattened worms with tissues and internal organ system. Simplest animals to have three embryonic germ layers. Bilateral symmetry . http://www.docstoc.com/docs/79739092/Invertebrates-Section-1. Age of Inverts. Age of Fishes. Age of Reptiles. Age of Mammals. Age of Man. http://hotelcondesdeharo.com/contacto/time-periods-dinosaurs. 1. Phylum Annelida. Class Polychaeta. Class Clitellata. Phylum Annelida. 2. Annelid Characteristics. Defining Characteristics. One or more pairs of chitinous setae. The phylum includes polychaetes, earthworms, leeches, and vestimentiferans. The Importance of Evolution in Ecology. Ecologists study proximate or “how” questions:. How nutrients flow through ecosystems. Evolutionary biologists study ultimate or “why” questions:. Why does a stickleback fish have armor in one lake but not another?. THEORY OF EVOLUTION. The theory of evolution is scientists explanation of how living things began. .. Also called organic evolution . LIVING ORGANISMS HAVE CHANGED GRADUALLY OVER TIME TO FORM NEW ORGANISMS THAT ARE MORE COMPLEX.. Evidence of Evolution. Essential Questions. What is the anatomical evidence of evolution?. How are fossils used as evidence of evolution?. What evolutionary evidence do we have from the field comparative embryology?. Which one?. There are 3 great universal questions. 1) Where did I come from?. 2) Why am I here?. 3) Where am I going?. The answer to the last 2 questions are dependent upon the answer to the first question. . Zany Zoology!. Welcome to the wild world of animals!. Think of an animal. List on board. Most likely listed vertebrates. <5% of animal species are verts. This chapter introduces the invertebrates, most of which do not resemble us much…. Last week we talked about. …. The universe had a beginning. God must be the creator of the universe. 3 views Christians can faithfully hold: Old-Earth Creationism, Young-Earth Creationism, Theistic Evolution. Mechanisms of concerted evolution. Unequal cross-over. Gene conversion: non-reciprocal transfer of information between homologous sequences; the main mechanism invoked to explain concerted evolution. . Complete . circulatory system with capillaries, arteries and veins. . Body . wall made of circular and lengthwise muscles. . Continuous . gut running from mouth to anus with own musculature. . Bristle-like . 1 Animal Body Plans 2 Components of Organisms What are the levels of body organization from simple to most complex? 3 Components of Organisms Cells---- Single cells with specific functions Tissues---- Evolution 9/11. Obj. TSW learn form mistakes made on the quiz, and take notes about evolution after the Environmental Science Current Events. P. 34NB. Make a food chain for the following organisms showing the energy arrows and the . . The process by which organism change over time. Based on science, not opinion.. Darwin. :. Evolution is descent with modification. Evolution. :. changes through time. Species accumulate difference.