WebMar 16, 2016 · The discovery of medullary bone is just one more piece of evidence that blurs the line between birds and other theropod ... but is entirely gone after the female has finished laying eggs," Dr ... Weba shelled egg surrounding four extraembryonic memebranes and embryo nourishing yolk. This evoluntionary adaptation permitted mammals and reptiles to live and reproduce in drier enviroments than can most amphibians
How did dinosaurs build their nests? - CSMonitor.com
WebApr 14, 2024 · Many types of birds can be classified based on size, weight, mannerisms, etc. Birds are warm-blooded with beautiful feathers, wings, and lay eggs. Many scientists believe theropod dinosaurs are the ones from where birds evolved and have 10000 species of birds worldwide. Every year 20% of birds migrate over long distances. WebA) Feathers may have originally evolved for interspecies communication and display. B) The evolution of feathers and other characteristics of birds occurred in a linear progression. C) Feathers may have originally evolved for insulation. D) Feathered birds, capable of flight, evolved after the extinction of dinosaurs. els phonics phases
Researchers discover a dinosaur preserved sitting on a nest of …
WebSep 25, 2024 · The unearthing of nest and egg fossils confirm that theropods laid hard-shelled eggs, and some nests have shown clutch sizes of up to 40 eggs. Medium-sized … WebOne of the many unanswered questions about dinosaur reproduction is how the giant sauropods (like Apatosaurus, Diplodocus, and Brachiosaurus) laid their eggs without … WebStudy with Quizlet and memorize flashcards containing terms like A tetrapod with scaly skin that reproduces by laying an amniotic egg is a ____________. A. reptile B. thecodont C. dinosaur D. phytosaur, The amniote egg ___________. A. has a amnion B. is characteristic of reptiles C. has a mineralized shell D. all of the above, The amniotic egg and skeletal … els phils inc