The Amniotes 0.0 / 5 ? BiologyAmniotesUniversityNone Created by: ppogbaCreated on: 15-07-19 14:04 What is an amniotic egg? What did it eliminate the need for? a self-contained waterproof chamber for development, eliminates the larval stage. 1 of 27 Name the 4 extraembryonic membranes in the amniotic egg? Amnion, Allantois, Chorion, Yolk sac. 2 of 27 What is the purpose of the Chorion? Gas exchange- allows oxygen in. 3 of 27 What is the purpose of the Amnion? Protects embryo with surrounding amniotic fluid. 4 of 27 What is the extra-embryonic layer that stores nitrogenous waste? Allantois 5 of 27 What are the 3 main branches of the amniotes? What are they based on? Anapsid, Diapsid, Synapsid. Based on number of fenestra (windows) in the skull. 6 of 27 What is the purpose of the fenestra in the skull? Holes in the skull used for muscle attachment. 7 of 27 What do Anapsids have? What species are found here? No fenestra. Turtles and extinct reptiles. 8 of 27 What do the Diapsids have? Give species found here? 2 fenestra. Other reptiles, birds. 9 of 27 What do Synapsids have? What is found here? 1 fenestra. Mammals. 10 of 27 How many species are present in Class Reptilia? 7000 species 11 of 27 What period of earth's history is known as the 'Age of Reptiles'? Mesozoic 12 of 27 From the reptiles, 2 major radiations occurred. When? Early mesozoic and late Triassic. 13 of 27 The first radiation led to anapsid, diapsid and synapsid. What two groups did the diapsids split into? Lepidosauria and archosauria 14 of 27 What did the Lepidosauria lead to? modern snakes and lizards 15 of 27 What did the archosauria lead to? dinosaurs, crocodiles and birds. 16 of 27 What happened in the second radiation? Archosauria radiated and gave rise to 3 groups: crocodiles, pterosaurs and dinosaurs. 17 of 27 Name the 3 Orders from the modern reptiles. Order Chelonia, Order Squamata, Order Crocodilia. 18 of 27 What animals are found in Order Chelonia? How many species? turtles, terrapins, tortoises. 250 species. 19 of 27 Lizards and snakes are found in what order? How many species? Order Squamata. Lizards=4000sp. Snakes=2500sp. 20 of 27 Alligators and Crocodiles are found in what order? How many species? Order Crocodilia. 22 species. 21 of 27 Class Aves has reptile features like scaly legs and amniote egg. So what are they defined by? the presence of feathers. 22 of 27 Feathers consist of 3 things for structure. What are they? shaft, barb and barbules with hooks. 23 of 27 Name the 4 types of feather. filoplumes, down, flight, contour. 24 of 27 What group of birds include ostriches, emus and kiwis? Ratites 25 of 27 What is the name of the group of birds that possess a keel/carina? How many orders and species within? Carinates. 24 orders. 10,000 species. 26 of 27 60% of Carinates are Passeriformes. What does this mean and give example? perching birds. eg. sparrows, warblers. 27 of 27
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