Terms : Hide Images
| 138432371 | notochord | what is the flexible rod of the chordate? | |
| 138432372 | bone, spine | what is the notochord replaced by in adult form? | |
| 138432373 | brain and spinal chord | what does the dorsal, hollow nerve chord develop into? | |
| 138432374 | pharyngeal gill slits | what functions in filter feeding and gas exchange in chordates? | |
| 138432375 | digestive system | what do the gill slits replace in chordates? | |
| 138432376 | cephalochordata | which subphyla of chordata contains lancelets? | |
| 138432377 | lancelets | what are tiny marine animals that retain the four characteristics of chordates in adults? | |
| 138432378 | urochordata | which subphyla of chordata contains tunicates and sea squirts? | |
| 138432379 | vertebrates | which subphyla of chordata contains organisms in which the notochord is replaced by vertebrae which encloses the nerve chord? | |
| 138435510 | agnatha | which class contains lampreys and hagfish? | |
| 138435511 | placodermi | jawned fish, went extinct 350 mya | |
| 138435512 | lampreys and hagfish | ostracoderms, jawless, small, lack paired fins | |
| 138435513 | condrichthyes | cartilinginous fish, sharks rays | |
| 138435514 | lateral line system | microscopic organs along sides of fish's body which are sensitive to water pressure changes | |
| 138435515 | internal fertilization | how do condrichthyes reproduce? | |
| 138435516 | osteichthyes | which class contains bony fish? | |
| 138435517 | operculum | flap over gill chamber that allows fish to pull water over gills without moving? | |
| 138435518 | bony fish | which kind of fish has mucus on their scales and an operculum? | |
| 138435519 | amphibia | which class contains frogs, salamanders, newts, toads | |
| 138435520 | mouth and across skin | how do amphibians have gas exchange? | |
| 138447028 | reptilia | contains lizards, snakes, turtles, crocodiles | |
| 138447029 | keratin | what are the scales of reptiles made out of? | |
| 138447030 | prevents drying out | what is the purpose of keratin on scales? | |
| 138447031 | 3 chambered heart | what kind of heart do reptiles have? | |
| 138447032 | 4 chambered heart | what kind of heart do birds have? | |
| 138447033 | endothermic | how do birds retain metabolic rate? | |
| 138447034 | lack keeled breastbone | what is the characteristic of flightless birds? | |
| 138447035 | monotremes | group of mammals that lay eggs | |
| 138447036 | marsupials | group of mammals that give birth to immature young | |
| 138447037 | placentals | group of mammals that nourish embryo in womb of mother | |
| 138447038 | acoelomate | solid body with no body cavity between digestive tract and outer wall; single opening with mouth and anus | |
| 138447039 | pseudocoelomate | have fluid filled body cavity not lined with mesoderm | |
| 138447040 | coelomate | true body cavity developed within medoderm lined with mesoderm | |
| 138447041 | zygote | first stage of embryo development | |
| 138447042 | morula | solid mass of cells | |
| 138447043 | morula | second stage of embryo development | |
| 138447044 | blastula | hollow ball of cells | |
| 138447045 | blastula | third stage of embryo development | |
| 138447046 | gastrula | fourth stage of embryo development | |
| 138447047 | cleavage | what produces that morula | |
| 138447048 | gastrulation | what produces coelom, mouth, and anus | |
| 138574997 | protostomes | mouth from blastopore | |
| 138574998 | deuterostomes | anus from blastospore | |
| 138574999 | blastospore | first opening formed | |
| 138575000 | protostome | coelomate that has determinate cleavage | |
| 138575001 | deuterostome | coelomate with interdeterminate cleavage | |
| 138575002 | diploid stage | dominant generation for animals | |
| 138575003 | endoderm | inner layer, digestive tube, liver, lungs | |
| 138575004 | mesoderm | middle layer, muscles and other organs | |
| 138575005 | ectoderm | outer layer, outer covering, CNS | |
| 138575006 | hemolymph | which chemical is propelled through arteries in an open circulatory system |
