Reading Guide for Chapter 35 – The Vertebrates 1. What are the five features of the chordates? • A hollow dorsal nerve cord just beneath the dorsal surface of the animal. In vertebrates this differentiates into the brain and spinal cord. • A flexible rod called the notochord that’s on the dorsal side of the primitive gut in the early embryo‚ present at some developmental stage in all chordates‚ located just below the nerve cord. May persist in some chordates; in others‚ it is replaced by
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seal‚ salamander‚ giant eel‚ or marine slug. 9. Some scientists believe the description of the creature matches that of a plesiosaurus‚ a reptile extinct for 70 million years! 10. It could be a very long time before we humans know the truth about that mystery known as "Nessie." In 1960‚ Tim Dinsdale filmed something that might have been a giant reptile. He believed strongly in the reality of the monster and advertized his beliefs to others. His seriousness prompted some to take more seriously
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CHAPTER 1 Man’s Origin--Where Did I come from? Whenever we are seeking to find out the ORIGIN of something‚ we are asking the question‚ "Where did it begin?" "How did it all begin?" "How did it originate?" "Where did it come from?" In this chapter we are concerned about the origin of man. How did man begin? How did the human race get started? Who are my ancestors? One of the most important questions facing every man‚ woman‚ boy and girl is the question WHERE DID HUMANS COME FROM? How did
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Wildlife Issues Topic Answers Reading One 1 Dr. Julie Savidge concluded that Brown-tree Snake predation was the cause of declines of forest bird populations on Guam. 2 Recently‚ the National Park Service banned snow-mobiling in Denali Nation Park. 3 The National Audubon Society of today is an offshoot of the Massachusetts state Audubon society. 4 False: Wildlife issues or other environmental issues should be resolved based on public opinion as the majority is never wrong.
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SEDIMENTARY BASINS - AN INTRODUCTION Definition of a sedimentary basin: A sedimentary basin is an area in which sediments have accumulated during a particular time period at a significantly greater rate and to a significantly greater thickness than surrounding areas. (Compare with physiographic basin - a depression in the surface of the land or sea-floor that may or may not be infilled with sediments). Sedimentary basins of one type or another today cover about 70% of the Earth’s surface and contain
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other reptiles. By doing this‚ it prevents the dramatic overpopulation of certain organisms. The American Alligator is native to southeastern swamps‚ rivers‚ and marshes ranging from South Carolina to eastern Texas. It uses the shallow marshes to help gain strong advantages against it’s prey. The alligator’s color matches the moss covering the water‚ making it harder for the prey to see the alligator. In freshwater swamps and marshes‚ the American Alligator tends to be an independent reptile meaning
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that occurs once the rhetoric is used. In the book “The Presence of Others” by Andrea Lunsford and John Ruszkiewicz‚ two stories talk about things and ideas that appeal to guys. Dave Barry wrote the story “Guys vs. Men” and Keith Bradsher wrote “Reptile Dreams‚” and they used rhetorical strategies throughout their stories to help push their point across to the reader. In the story “Guys vs. Men”‚ Barry talks about how guys are unique from men‚ and
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two teams of paleontologists investigated a 70 million year old mystery. The paleontologist have unearthed dozens of dinosaurs‚ their bones complied together‚ fossilized‚ and preserved in permafrost for eons. The startling discovery of ancient reptiles‚ also known as the “thunder lizards‚” had taken scientists by surprise because it lived and thrived in the arctic. This discovery raises questions as to how the dinosaurs were able to survived in such cold and harsh conditions. This essay will
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skin). In mammals‚ the skin is the largest organ of the integumentary system made up of multiple layers of ectodermal tissue‚ and guards the underlying muscles‚ bones‚ ligaments and internal organs.[1] Skin of a different nature exists in amphibians‚ reptiles‚ and birds.[2] All mammals have some hair on their skin‚ even marine mammals which appear to be hairless. The skin interfaces with the environment and is the first line of defense from external factors. "Integumentary " redirects here; in botany
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There are many theories on how dinosaurs became extinct but scientists have not yet found a proven reason why. About sixty-five million years ago Dinosauriformes‚ or as we call them Dinosaurs‚ walked and roamed planet Earth. These massive carnivores‚ herbivores‚ and omnivores lived many years on earth before humans appeared. There were several variations of dinosaurs such as land‚ sea‚ and air dinosaurs. For a millions of years the dinosaurs thrived in their environment. They had an abundant food
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