A synapomorphy and symplesiomorphy for the vertebrates (respectively) would be; True tissues, Deuterostome development True tissues, Dorsal hollow nerve chord Eukaryotic, Dueterostome development Vertebral column, True tissues
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- Figure 27.9 Which of the following statements about diploblasts and triploblasts is false? Animals that display radial symmetry are diploblasts. Animals that display bilateral symmetry are triploblasts. The endoderm gives rise to the lining of the digestive tract and the respiratory tract. The mesoderm gives rise to the central nervous system.Earthworm Cross Section (Annelid Cross Section) Describe each function in the earthworm cross-section: epidermis, seta, ventral blood vessel, ventral nerve cord, cuticle, coelom, dorsal blood vessel, etc. Also indicate which parts are derived from ectoderm, mesoderm, and from endodermEarthworms are segmented animals. All of the following are present on/in most segments of an earthworm except; Vascular tissue reproductive tissue Chetae A coelom
- The tapeworms (cercomeromorpha) are not considered to be segmented animals because; The "segments" of an earthworm only contain reproductive tissue The segments of a tapeworm die when they break away None of these answers is correct--tapeworms ARE considered segmented animals They have a scolexWhich of the following animal groups is triploblastic, has deuterostome development, and has a digestive system, a nervous system, and an excretory system, but does not have a vertebral column? the acoelomate flatworms (like the planaria) the cephalochordates (like the lancelet) the poriferans (like the calcareous sponges) the coelenterates (like the jellyfish) the agnathan fishes (like the sea lamprey)Explain the importance of the presence of symmetry (radial and biradial) and presence of true tissues in the biological proccesses of cnidarians and ctenophores. Radial/biradial symmetry True tissues Reproduction Development Body support Locomotion
- germ layer present / levels of organization and coelom specimen type of animal based on number and organization of germ layer present (diploblastic, triploblastic) type of coelom (none, pseudocoelom, true coelom) scypha hydra dugesia ascaris earthworm How did the structural complexity change among phyla as the number of germ layers increased? Is there an advantage of having a mesoderm, why or why not?Animals with three tissues layers have other synapomorphies that differentiate them from diploblasts. Choose all that apply: specialized muscle tissue Bilateral symmetry Specialized reproductive tissues Specialized respiratory organs O Specialized circulatory organs for pumping blood or hemolymph O A nervous system with an anteriorly located processing center (brain)An organism classified in phylum Mollusca that is a predator with tentacles, a brain and complex eyes would be classified into which group? gastropod cephalopod bivalve none of the above Which structure from the list below is made up of specialized cells called cnidocytes? Tentacle Bud mesoglea epidermis (ectoderm) Teste (spermerary) Reproductive polyp Foot Ovary Feeding polyp Gastrovascular cavity Mouth hydrostatic skeleton medusa
- Please match the term with the description. the anterior end of a tapeworm that attaches to the inside lining of its host's digestive tract [ Choose ] [Choose] medusa describes the number of tissue layers in polyp coelom Cnidarians cnidocytes monoecious the cells that move water through a sponge gastrovascular cavity acoelom pharynx the cells that produce nematocysts scolex gonozooid osculum pseudocoelom triploblastic choanocytes diploblastic spongocoel water leaves a sponge through this opening proglottid spicule ventral sucker an incomplete digestive tract a planarian uses this to suck up food particles [ Choose ] a fluke uses this to hang onto its host's [ Choose ] tissues > > >Cnidarians (and ctenophores) are diploblastic animals. What is the fate of the ectodermal and endodermal cells in cnidarians? Answer this by keeping track of structures /Nssues /cells of “organs” that are derived from the ectoderm or from the endoderm or both and by which group/taxa. Is there a common pattern for all or are there variations?A radula in a gastropod is a female reproductive structure A sharp, tooth like structure for killing prey a structure that aids in feeding a sense organ for detecting light Which choice correctly identifies the body plan of a Mollusc? radial symmetry bilateral symmetry asymmetry (no symmetry) A characteristic present in members of the arthropod subgroup that includes spiders, but not present in other arthropod classes would be the presence of chelicerae. an open circulatory system. an exoskeleton. a cuticle. a cephalothorax.