PPT-1. Reptiles were the first animals to posses an amniotic eg

2 Amniotic eggs have membranes that protect the embryo from desiccation cushion the embryo help with gas exchange and store waste material 3 The amniotic eggs of reptiles and birds also have leathery or hard shells that protect the developing embryo and a yolk that supplies food to them. What is a Reptile?. Reptiles have a well-developed skull, a backbone and tail, four limbs.. Snakes will be limbless and turtles have hard shells that are fused with their vertebrae.. All reptiles have dry, scaly skin, lungs, and eggs on land.. For each theory . Explain the mechanisms. State the evidence. Q7. If you get stuck use the . ipad. and web age below.. http://. en.wikipedia.org. /wiki/. Alvarez_hypothesis. Over view of classification. Jessica Brown. Miila. Hall. Cold-blooded. Tetrapods. , four appendages. Considered as the first animals on land with the ability to live and multiply on land (amniotic egg). Amniotic egg- . a shelled, water-like sac that enables reptiles to complete their life cycles on dry land.. Maya, Courtney, and Jae-. L. ynn. Characteristics. Reptiles are cold-blooded, vertebrates with scales covering their skin. . They are considered as tetrapod's (with four legs or leg-like appendages) even though legs are absent in some animals, like snakes. . Science class. How are animals classified?. Animals are classified based on their similarities and differences…. Scientists divided the animal kingdom into two main groups, vertebrates and invertebrates.. Click Here!. Can any of you . name. these three reptiles?. Objective: Today we are going to learn how to describe three basic characteristics of reptiles. . Click to Check out REPTILES!. Menu. Crocodiles. Justify the statement that “the amniotic egg provided solutions that made development apart from external watery environments possible.”. Compare amniote taxonomy before and after the application of cladistic methods.. History of Reptiles. Reptiles arose from amphibians. Earliest fossils 359 . m.y.a. Small, four – legged vertebrates w/small teeth. Pangaea. Drier climate. Mass extinction during Paleozoic era. Diversified to fill niches left by extinct species. Characteristics . of . vertebrate . animals. Animals with a backbone or vertebral column.. There are 5 major subgroups of vertebrate animals.. Vertebrate animals: Mammals. Rabbit. Vertebrate animals: Fish. Reptiles have a well-developed skull, a backbone and tail, four limbs.. Snakes will be limbless and turtles have hard shells that are fused with their vertebrae.. All reptiles have dry, scaly skin, lungs, and eggs on land.. 9-25-17. 1. How does a vertebrate differ from an invertebrate?. A. A vertebrate eats only vegetables. B. All vertebrates are warm blooded. C. All vertebrates can fly. D. All vertebrates have a backbone. Chapter 26 Reptiles and Birds Reptiles Skin is smooth and dry, covered in scales Helps prevent the evaporation of water from its body. First vertebrates with adaptations that enabled them to survive on land only. Three Domains:. Six Kingdoms. Characteristics of Animals. All . multicellular. . (metazoans). Eukaryotes. . (cells with nucleus & organelles). Ingestive. . heterotrophs. . (take in food and internally digest it). These were the first class of organisms to adapt to life on land. They are believed to have evolved from the amphibians millions of years ago. There are about 10000 different species of reptiles on earth. They are cold-blooded animals belonging to the phylum Chordata of Animal kingdom.