Biology 1108 (KSU) Study Guide Exam 3 Questions with Correct Answers 2025

Biology 1108 (KSU) Study Guide Exam 3
Questions with Correct Answers 2025
PoriferaW-WCORRECTWANSWERW–

-SpongesW

-WbasalWgroup

-WNoWspecializedWtissues

-WSpiculesW(madeWupWofWcalciumWcarbonateWandWsilica)

-WInternalWcellsW(choanocytes)

-WFiltersWgallonsWofWwaterWtoWcatchWfoodWparticles



CnidariaW-WCORRECTWANSWERW--jellyfish,Wanemones,Wcorals,Whydra

-radiallyWsymmetric

-WendodermWandWectoderm

-Wcnidocytes

-WsessileWandWfloatingWanimals

-WoneWcavityW(mouth/anus)

-WcoralsWhaveWphotosyntheticWzooxanthellaeWlivingWbetweenWtheirWendoWandWectoderm



PlatyhelminthesW-WCORRECTWANSWERW--WmesodermWevolves

-WmouthWandWanusWseparate

-Tapeworms,Wflatworms,WliverWflukes

-Wfree-livingWandWparasitic

-WnoWlimbs

-WsimpleWsimilarWtoWa.WCoelaW(basalWofWbilateral)

,MolluscaW-WCORRECTWANSWERW--Woysters,Wclams,Wsnails,Wslugs,Woctopi,Wsquid

-Whead,WfootWandWmantle

-Wbivalves

-WgastropodsW(snails/slugs),WchepalopdsW(squids/octopus)

-WmostWmarineWbutWsomeWterrestrialWandWfreshwater

-Wsoft-WbodiedWanimals

-WhardWcalciumWcarbonateWshell



AnnelidaW-WCORRECTWANSWERW--WSegmentedWwormsW-WconvergentWevolutionWw/Warthropods

-Wearthworms,Wleeches,WmanyWintertidalWsaltwaterWspecies,WandWtubeworms

-WTubeworms-WhaveWchemoautotrophicWbacteriaWlivingWinWtheirWtissuesW(H2S)

-WbacteriaWbreakWdownWH2SWandWprovideWchemicalWbonds

-WmakeWroots



NematodaW-WCORRECTWANSWERW--Wroundworms

-WparasitesWofWbothWplantsWandWanimals

-WC.Welegans-W1stWanimalWgenomeWtoWbeWfullyWsequencedW(1998)



ArthropodaW-WCORRECTWANSWERW-(⅔WofWallWdescribedWspeciesWofWanimals)

-WallWearthWhabitats

-WSegmentedWinvertebratesWwithWjointedWappendages

-WCrustaceansW(crabs,Wlobsters,Wshrimp,Wbarnacles)

-WCheliceratesW(horeshoeWcrabsWscorpions,Wspiders)

-WMynapodsW(millipedes,Wcentipedes)

-WHexapodsW(insects)

, -WTrilobitesW(extinct,W270Wmya)

-WexternalWskeletonWmadeWofWpolysaccharideWchitin

-WcrustaceansWhaveWcalciumWcarbonateWinWexoskeletonW

-WhorseshoeWcrabs-WantibodyWtestingW(blueWblood)



EchinodermataW-WCORRECTWANSWERW--WsessileWmarineWanimalsW

W W - includesWseaWstars,WbrittleWstars,WseaWurchins,WseaWcucumbers

-WsharedWcommonWancestorWforWEchinodermataWandWChordatesW

-WradialWsymmetryWevolvedWfromWtheWbilateralWsymmetryWofWancestorsW

-WspinyWskinWcoversWaWcalciumWcarbonateWskeleton



ChordataW-WCORRECTWANSWERW--WLanceletsW(firstWdivergedWspecies)

W W - tubularWbody,WnoWeyes,WandWnoWbrain

W W - ancestorWofWallWchordatesWhadWtubularWbody

-
WsynamorphiesWcanWbeWseenWinWembryonicWstageWand/orWatWmaturityW(postWanalWtailWinWhumanW
embryos)



KnowWwhichWphylaWareWinvolvedWinWtheWdebateWoverWwhoWisWtheWfirst-
branchingWanimalWlineage,WwhichWhypothesisWisWbestWsupportedWbyWtheWrecentWresearchWpaper,
WandWwhatWthatWimpliesWaboutWtheWcommonWancestorWofWallWanimalsWregardingWtissueWandWcom


plexityW-WCORRECTWANSWERW--
WPoriferaW(supportedWbyWaminoWacids,WmaximumWparsimony,WmorphologicalWsimilarities)W(bette


rWgeneticWmodel),WCtenophoraW(combWjellies),WandWPlacozoa.

-WcommonWancestorW-WnoWspecializedWtissues,WnoWsymmetry,Wspicules



WhatWphylumsWbelongWtoWtheWDeuterostomes?W-WCORRECTWANSWERW--WDeuterostomes

W W - Echinoderms