L10 marine life - BILD 3 July 9 2010 Porifera[sponges Cnidaria Lophotrochozoans!Platyhelminthes!Molluscs!Annelids Ecdysozoans!Nematodes!Arthropods

L10 marine life - BILD 3 July 9 2010 Porifera[sponges...

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BILD 3 July 9, 2010 Woodruff: marine life 1 Porifera [sponges] Cnidaria Lophotrochozoans Platyhelminthes Molluscs Annelids Ecdysozoans Nematodes Arthropods Deuterostomes Echinoderms Chordates Marine life: greater diversity in the sea than on land All species are marine: 15 of 42 phyla All brown algae and echinoderms Most species are marine: 9 of 42 phyla Red algae, sponges, coelenterates, annelids, molluscs Many species are marine: 9 of 42 phyla Chlorophytes, arthropods, platyhelminthes, chordates Few species are marine: 6 of 42 phyla Cyanobacteria, fungi, tracheophyta (vascular plants) No species are marine: 3 of 42: bryophytes Five major groups of animals GREAT BARRIER REEF, AUSTRALIA VISIBLE FROM SPACE 1000 MILES LONG PALAU, MICRONESIA REEF FLATS, SULAWESI
BILD 3 July 9, 2010 Woodruff: marine life 2
BILD 3 July 9, 2010 Woodruff: marine life 3 Chapter 32: INTRODUCTION TO ANIMAL DIVERSITY Animals are multicellular, heterotrophic eukaryotes with tissues that develop from embryonic layers. Cleavage, blastula, gastrula Diploblastic, triploblastic Symmetry: radial, bilateral (cephalization) Tissues: ectoderm, endoderm, mesoderm Body cavities: acoelomate, coelome, pseudocoelome (multiple origins of the last two) Development: protostome, deuterostome History of animals spans a billion years: half of it still undocumented by fossils Porifera Cnidaria Platyhelminthes Mollusca Annelida Nematoda Arthropoda Echinodermata Chordata Fig. 33-2 ANCESTRAL PROTIST Common ancestor of all animals Calcarea and Silicea Eumetazoa Bilateria Cnidaria Lophotrochozoa Ecdysozoa Deuterostomia Fig. 32-2-3 Zygote Cleavage Eight-cell stage Cleavage Blastula Cross section of blastula Blastocoel Gastrulation Blastopore Gastrula Archenteron Ectoderm Endoderm Blastocoel Fig. 32-9 Protostome development (examples: molluscs, annelids) Deuterostome development (examples: echinoderm, chordates) Eight-cell stage Eight-cell stage Spiral and determinate Radial and indeterminate Coelom Archenteron (a) Cleavage (b) Coelom formation Coelom Key Ectoderm Mesoderm Endoderm Mesoderm Mesoderm Blastopore Blastopore Solid masses of mesoderm split and form coelom.

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