Professor Andrew, a paleontologist discovers a transitional fossil between a stem amniote and mammal. In 150 words express on what group of animals this might have belonged to and on their major antomical features !
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- Figure 15.33 Which of the following statements about common features of chordates is true? a. The dorsal hollow nerve cord is part of the chordate central nervous system. b. In vertebrate fishes, the pharyngeal slits become the gills. c. Humans are not chordates because humans do not have a tail. d. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column.In the phylogeny below, the origin of which trait could be indicated by the letter B? A single temporal opening on the side of the skull Extra-embryonic membranes A placenta Jaws Hair and mammary glands lungfish frogs salamanders caecilians parareptiles turtles lizards mosasaurs snakes ichthyosaurs plesiosaurs crocodiles ornithisichian dinosaurs non-avian saurischian dinosaurs birds eothyridids caseids varanopids ophiacodontids edaphosaurids sphenacodontids biarmosuchians dinocephalians squopowoue gorgonopsians therocephalians snupeubossejeyɔ Probainognathus uopouoɔous marsupial: monotremes placentalsImagine if centaurs were real. Make a Cladogram (Evolutionary Origin) showing its closest relatives (most shared characteristics) and where modifications evolved.
- Pick two organisms from the cladogram below and make a claim about the evolutionary relationship between these organisms. Support your claim using evidence from the lesson and scientific reasoning about evolutionary relationships. Ray-finned fish Rodents Sharks Amphibians Primates & rabbits Crocodiles Birds Hair Eggs with shell Amniotic egg Four limbs Bony skeleton Vertebrae Image Source a relationship betwwen a shark and bird is a bony skeleton amitotic egg and four limbsBased on the notion of shared derived characters, which trait could be indicated by the letter J? CO m Limbs with digits Gills Larval stage Vertebrae Pharyngeal slits H Echinodermata Cephalochordata (lancelets) Urochordata (tunicates) Myxini (hagfishes) Petromyzontida (lampreys) Chondrichthyes (cartilaginous fish) Actinopterygii (Ray finned fish) Actinistia (coelacanths) Dipnoi (lungfishes) Amphibia Reptilia MammaliaWhich structure classifies an organism as a gnathostome? a lateral line system a mineralized bony skeleton amniotic eggs hinged jaws
- Match the benefit to the correct chordate adaptation. allows organisms to walk on land [Choose] [Choose ] tetrapod allows organisms to lay eggs on land, without water ectotherm endotherm bony skeleton amniotic eggs allows organisms to generate their own heat seeds provides a rigid structure for muscles [Choose]Pair the words with the right description: Mammalia , Testudines, Rhynchocephalia, Amniota Tetrapoda,Cryptodira, Reptilia ,Squamata, Crocodylia, Pleurodira, Lepidosauria,Archosauria,Crocodiles, Anura The oldest lineage of extant reptiles. This clade is the sister taxon to reptiles. Adults are terrestrial and nocturnal, while the young are diurnal. Larval forms of most species are herbivorous while adults are insectivorous/carnivorous. The closest living relatives of avian reptiles. They are known as the "side necked" turtles. Have elongate, tapering snouts and, with the mouth closed, the 4th tooth on the lower jaw is visible. Most diverse and speciose clade of reptiles. Adults of this taxon are known to be cannibalistic on younger individuals. Possess teeth set in bony sockets and replace teeth throughout their lives. Males in this taxon have paired copulatory organs and movable quadrate bone in the skull. Members of this order…Your age-dating put the age of the rocks you are examining in the early Devonian period. Because of this, you suspect that the vertebrate remains you found might belong to some of the earliest tetrapods (four-legged animals including land vertebrates) to walk the Earth. Examine the cladogram below. What is the sister group to the land vertebrates? Lampreys Sharks Lungfish Land vertebrates Tetrapoda Choanata Fingers and toes Osteichthyes Choanae Gnathostomata Bony ribs and shoulder girdie Vertobrata Jaws O Lampreys Vertebrae O Tetrapoda O Amphibians Lungfish Ray-finned fish Amphibians
- In a table, compare and contrast the generalized fish and generalized tetrapod skulls based on the three phylogenetically distinct parts of a vertebrate skull. Fish Skull Tetrapod Skull Chondrocranium Dermatocranium SplanchnocraniumUse the information and diagram to answer the following question. Scientists discovered a 375-million-year-old fossil in Canada. The diagram shows the top and side views of the fossil. Top view Side view Which observation would best support the claim that this organism was a transitional form between amphibians and fish? O A. The fossil has some body structures that are analogous to amphibians and some body structures that are vestigial. O B. The fossil is larger than most modern amphibians, but smaller than most ancient fish. O C. The fossil was discovered near a lake, which shows that the organism needed water to reproduce, as do amphibians and fish. O D. The fossil has some body structures that are homologous to amphibians and some body structures that are homologous to fish. 757 PM P Type here to search 3/22/2021 BANG LOLUFSEN insert ort sc Delete + backspace home R H. pause 1 shift C V MExplain the significance of the discovery of Archaeopteryx. Why did this fossil demonstrate beyond reasonable doubt that birds are grouped phylogenetically with dinosaurs?