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Cnidaria

33

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Biology
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Platyhelminthes
Triploblasty
Gastrovascular cavity
Flatworm
Eumetazoa
Cnidaria
Invertebrate
Sponge
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Zoology
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taxonomy
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An Introduction to Invertebrates Chapter 33 Porifera (Sponges) Parazoa (no true tissue) Sedentary (Sessile) Suspension Feeders Choanocytes (Collar Cells) Cnidarians (Hydras, Corals, Jellies) Eumetazoans (True Tissue) Diploblastic Radial Body Plan Gastrovascular cavity Single opening serves as anus and mouth Lophotrochozoans Eumetazoans Bilateral Symmetry Triploblastic Lophotrochozoans Platyhelminthes (Flatworms) Triploblastic acoelomates Ex. Planarians Platyhelminthes (Flatworms) Trematodes (parasitic flukes) Platyhelminthes (Flatworms) Tapeworms (parasitic flatworm) Scolex proglottids Lophotrochozoans Rotifers Alimentary canal Pseudocoelomates parthenogenesis Lophotrochozoans Lophophorates Have crown of ciliated tentacles around mouth Coelomates

Chapter 26: Phylogeny and the Tree of Life (9th Edition)

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Scientific classification
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#AP Biology #AP Bio #Biology #Study Guide #campbell

CAMPBELL BIOLOGY, AP* 9th EDITION Chapter 26: Phylogeny and the Tree of Life Biologists trace phylogeny - evolutionary history of a species or group of species To construct phylogenies, biologists use systematics - a discipline focused on classifying organisms and determining their evolutionary relationships. 26.1 The scientific discipline of taxonomy is how organisms are named and classified Common names don?t necessarily reflect the organism they signify (ex: silverfish is a bug and jellyfish is a cnidarian). So, we use Latin scientific names. They come in binomial, or two-part, format. Part 1 - the genus (pl. genera) of the organism Part 2 - ?specific epithet?, which is unique for every species in the genus.

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Nervous system
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Chapter?49 Nervous?Systems Multiple-Choice?Questions 1) Which?of?the?following?is?(are)?characteristic?of?a?simple?nervous?system? A) a?nerve?net?such?as?is?found?in?cnidarians B) nerve?cell?ganglia C) having?electrical?impulses?traveling?in?both?directions D) both?A?and?C E) A,?B,?and?C Answer: D Topic: Concept?49.1 Skill: Knowledge/Comprehension 2) Which?of?the?following?is?associated?with?the?evolution?of?a?central?nervous?system? A) a?complete?gut B) bilateral?symmetry C) radial?symmetry D) a?closed?circulatory?system E) excitable?membranes Answer: B Topic: Concept?49.1 Skill: Knowledge/Comprehension 3) An?organism?that?lacks?integration?centers A) cannot?receive?stimuli. B) will?not?have?a?nervous?system. C) will?not?be?able?to?interpret?stimuli.
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