PDF-Fossilised Sharks Teeth

A tooth become a fossil when it is buried in sediment or other material soon after being lost from a sharks mouth The sediment precludes oxygen and harmful bacteria from reaching the tooth and. Chordata. Subphylum: Vertebrata. Superclass: . Gnathostomata. Class: . Chondrichthyes. Subclass: . Elasmobranchii. Order : . Carcharhiniformes. & . Pristiformes. . (. Blacktip. Shark and . Marine Fishes. Section 12.1. . Protochordates. and. Jawless Fishes. Objectives. List. the distinguishing features of the . protochordates. . and the jawless fishes. Explain. the importance of studying . There are almost 400 different kinds of sharks. Each kind of shark looks different, has a unique diet, and behaves differently. . There are sharks in the four oceans of the world. . Some sharks are longer than a school . . By. : . Wajeha. . khan. Table of contents . Chapter 1 :Environment , Chapter 2 :Survival , Chapter 3 : Characteristics , Chapter 4 : Development , Chapter 5 : Breeds , Chapter 6 : Fun Fact. . SARASOTA FINS © 2015 . www.sarasotafins.weebly.com. This will cover:. Eyes. Teeth. Gills. Fins. S. kin. Ampullae of Lorenzini. Kingdom: . Animalia. . Phylum: . Chordata. . Subphylum: . Craniata. . . Infraphylum. : . Vertebrata. Classification. Largest and most successful group of chordates. Notochord: replaced by bony or cartilaginous vertebrae (the backbone). white . sharks?. Dr Alison Kock. Photo: Jean Tresfon. Populations of large predatory sharks are in decline. Shark populations. Slow growth, late maturity and low reproductive output = vulnerable to human threats . Chordata. Subphylum: Vertebrata. Superclass: . Gnathostomata. Class: . Chondrichthyes. Subclass: . Elasmobranchii. Order : . Carcharhiniformes. & . Pristiformes. . (. Blacktip. Shark and . Genevieve Rogan, Austin Marrs, Janet Kim, Joe Liverman. What’s a . shark. ?. There are many different types of sharks, however experts agree that all sharks share a few common characteristics:. -They are all predators. Phylum . Chordata. Class . Chondrichthyes. Subclass . Elasmobranchii. Superorder. . Selachimorpha. Known as “sea dogs” until the 16. th. century. Name “shark” may have come from the . Yucatec. When a shark loses a tooth, where does the new one come from?. SHARKS . What has fins, sharp teeth, and swims in the ocean? A shark! Sharks . have been around for a very long time. Sharks have lived in the oceans even before dinosaurs roamed the earth! Sharks are fish, and there are over 400 types of sharks. When they have babies, the babies are called pups. . iola and Diana. Parts of sharks. How many fins does a shark have? . Tail fin. Dorsal fin. Anal fin. Pectoral fins. 640 × . Pelvic fin,. t. Vocab. Cartilage- cartilage is a strong rubbery gill, this helps the organ that helps it breathe. . khan. Table of contents . Chapter 1 :Environment , Chapter 2 :Survival , Chapter 3 : Characteristics , Chapter 4 : Development , Chapter 5 : Breeds , Chapter 6 : Fun Fact. . A shark is a fish – what is a fish?. Three types of ‘fin’ fish or ‘true fish’:. Jawless fish. : ~ 100 species. Primitive. Lack a jaw, cylindrical and elongated bodies, no scales or paired fins. Few commercial uses. e.g. Eels or snakes.