PseudopodiaPredatory BehaviorDictyosteliumChemotaxisActinsCell MovementAmoebaMicroscopy, Electron, ScanningFood ChainMicroscopy, VideoMicroscopy, Electroncdc42 GTP-Binding ProteinAnnexin A2PhagocytosisSpidersLasers, Excimerrho GTP-Binding ProteinsCell SizeBdellovibrioCell AdhesionMicroscopy, Phase-ContrastFeeding BehaviorCell PolarityChemotactic FactorsProto-Oncogene Proteins c-crkCytoskeletonAstrocytomarac1 GTP-Binding ProteinMicroscopy, FluorescenceModels, BiologicalNeoplasm InvasivenessExtracellular MatrixLysophospholipidsrac GTP-Binding ProteinsRaptorsSerumMovementEcholocationCell MembraneMicroscopy, ConfocalCell Line, TumorCytoskeletal ProteinsHepatocyte Growth FactorMacrophagesCytoplasmHawksElectrophoresis, Gel, Two-DimensionalCharadriiformesCollagenSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationEcosystemGastrointestinal ContentsJaw3T3 CellsCells, CulturedSpheniscidaeCercopithecus aethiopsPerciformesCell LineImmunoblottingFibroblastsFalconiformesEaglesPopulation DynamicsFishesColubridaeCOS CellsSignal TransductionCarnivoryBody SizeWhale, KillerEnzyme InhibitorsChiropteraZooplanktonVideo RecordingDivingEscape ReactionTransfectionInsectsBirdsPopulation DensityWolvesBeetlesLizardsSilk