Reproduce? (Reproduction) Dinosaurs hatched from eggs laid by women following sexual reproduction. The eggs were elongated or round and had brittle‚ hard shells. Internally‚ the eggs of dinosaurs were likened to those of primitive mammals‚ birds and reptiles. The eggs contained the membrane called amnion‚ which kept the embryo moist. Some dinosaurs nurtured for their eggs although there are some that just laid them and abandoned them afterwards. Chapter 8: How did Dinosaurs Behave? (Behavior) Dinosaur
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Jurassic Period The Jurassic period is the second of the three divisions of the Mesozoic era‚ "The Age of Reptiles." The Jurassic lasted for 64 million years‚ from about 208 to 144 million years ago. Climatic Changes: Widespread deposits of sand in western North America indicate that the region experienced a desert climate during the early Jurassic. Coral reefs and the remains of temperate and subtropical forests around the world provide evidence that the climate became moister and milder
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Alligators and crocodiles do look similar but there are several physical characteristics that differentiate the two giant reptiles. Scientists separate alligators‚ crocodiles‚ and their cousins‚ caimans and gharials‚ according to differences in their skulls‚ scales‚ and teeth. The most easily observed difference between alligators and crocodiles is the shape of the head. The crocodile’s skull and jaws are longer and narrower than the alligator’s. The American alligator‚ Alligator mississippiensis
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omnivores. Description Did you know these turtles have four flippers two in the front and two in back? They use the front two flippers to help them swim. They use the back two flippers to dig a hole to lay their eggs. Green Sea Turtles are reptiles‚ reptiles have dry scaly skin and lay eggs that are soft shelled. You probably know these turtles are slow on land but green sea turtles can go twenty miles per hour underwater. Usually the turtles shell measures thirty to forty seven inches. The shell
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the humans for sport‚ though this has largely declined in the US in recent years.7 In other places‚ such as Cuba and Central America‚ poor economies have driven people hunt crocodiles for food.7 In contrast from the predators of the crocodile‚ the reptile lives in harmony with many similar species. Most species of crocodile tolerate one another and live in harmony when habitat and resources are not limited. Furthermore‚ as one might expect‚ in Florida‚ the American crocodiles have coexisted with their
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The Green Sea Turtle. Introduction: The Green Sea Turtle is one of only 7 species of sea turtle‚ with all being in danger of becoming extinct. It is one of the largest sea turtles and has the highest migratory area. This report will cover from its physical description through to the specific role that it plays in the environment‚ as well as solutions to bring the creature to a least concern of extinction. Animal Profile: The Green Sea Turtle’s carapace (shell) has a mottled brown top‚ with
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newspaper for all of New York so it has to be true and there are many article s on this website. 2/15/12 By: Anthony LaGioia The skull of a reptile called Shieldcroc that lived over 95 million years ago and was originally found in Morocco. It’s skull was five feet long. There doesn’t show a time about when the skull was uncovered but the reptile did live over 95 million years ago. Shieldcroc is the earliest African ancestor of the modern crocodile. Researchers believe that this reptile’s body
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vertebrates? (3 marks) The different groups are reptiles‚ birds‚ mammals‚ fish and amphibians 5) Can you name 2 features that each of the following groups of vertebrates have to enable them to classified into their groups:- • Mammals – Produce milk and give birth to live young • Birds – Most of them fly and all have solid egg shells • Fish – Have gills and live under water. • Amphibians – Have moist skin and lay soft‚ fragile eggs. • Reptiles – Have dry‚ scaly skin and lay eggs which are not
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The Nile crocodile (Crocodylus niloticus) is Africa’s largest crocodilian species and can reach a maximum size of 6 meters (Fergusson. R.A. 2010) and weigh up to 730 kilograms. However‚ the average C.niloticus grows to roughly 5 meters in length and weighs approximately 225 kilograms. Crocodiles are sexually dimorphic and so the male Nile crocodile grows up to 30% larger than the female. The largest accurately measured male C.niloticus‚ killed in Tanzania‚ measured an incredible 6.45 meters long
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evolved‚ huge populations of crocodilians‚ in more or less their present form‚ inhabited the waters and shorelines of rivers‚ lakes‚ swamps‚ and estuaries of tropical and subtropical lands. Today they represent the last true survivors of the huge reptiles that once dominated the seas and landmasses of Earth for over 200 million years¡¨ (6 Levy). However‚ ¡§¡KIt is
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