Evolution of Birds It has become widely accepted that birds have evolved from reptiles in the Jurassic period and are the living descendants of a group of dinosaurs called theropods. Birds share hundreds of unique skeletal features with dinosaurs. Over the years‚ birds have evolved in a wide variety of forms‚ from flightless and aquatic to flying animals. Due to poor fossil records‚ some information regarding the evolution of birds are based on theories but during the last 30 years‚ the evolutionary
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Evolution and classification Main article: Evolution of birds Archaeopteryx lithographica is often considered the oldest known bird The first classification of birds was developed by Francis Willughby and John Ray in their 1676 volume Ornithologiae.[5] Carolus Linnaeusmodified that work in 1758 to devise the taxonomic classification system currently in use.[6] Birds are categorised as the biological classAves in Linnaean taxonomy. Phylogenetic taxonomy places Aves in the dinosaur clade Theropoda
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Human Evolution Human Evolution‚ the biological and cultural development of the species Homo sapiens‚ or human beings. A large number of fossil bones and teeth have been found at various places throughout Africa‚ Europe‚ and Asia. Tools of stone‚ bone‚ and wood‚ as well as fire hearths‚ campsites‚ and burials‚ also have been discovered and excavated. As a result of these discoveries‚ a picture of human evolution during the past 4 to 5 million years has emerged. Human Physical Traits Humans are
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Introduction To Evolution What is Evolution? Evolution is the process by which all living things have developed from primitive organisms through changes occurring over billions of years‚ a process that includes all animals and plants. Exactly how evolution occurs is still a matter of debate‚ but there are many different theories and that it occurs is a scientific fact. Biologists agree that all living things come through a long history of changes shaped by physical and chemical processes that
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Evolution of the Alligator Evolution of the Alligator One of the most highly evolved animals on the Earth today is the alligator. Found mainly in the swamps and warmer climates of the earth‚ these predators are one of the few animals left that existed when the dinosaurs roamed the planet. Over the millennia‚ they have evolved into one of the most feared and interesting creatures today. However‚ the modern alligator is a far cry from its ancestral roots. Today‚ by looking at the anatomy of
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Lab #5: Refraction of Light Theory: Refraction can be defined as the bending of a wave when it enters a medium which causes it to have some reduced speed. In terms of light‚ refraction occurs when the ray passes through some medium which slows its speed; such as water or glass. In this instance the ray tends to bend towards the normal of the medium. The amount of bending or refraction which occurs can be calculated using Snell’s Law (). Objective: To measure the index of refraction of Lucite
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intelligence is very difficult. Many theories have been posed as selective mechanisms for the trends toward increased intelligence in primate evolution. Some emphasize complex ecological pressures‚ mainly foraging strategies as the primary forces driving an evolutionary increases in cognitive abilities‚ and other suggest that increased social complexity favored the evolution of primate intelligence (Tomasello and Call‚ 1997). Across the animal kingdom‚ brain size increases with increasing body size‚ however
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AP Biology Name:__________________________ Evolution Free Response Questions Answer the following questions in essay form. Outline form is not acceptable. Labeled diagrams may be used to supplement discussion‚ but in no case will a diagram alone suffice. It is important that you read each question completely before you begin to write. Your answers may be hand written or typed. You may use your notes and textbook to answer the question‚ but you may not discuss or write the question with
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“Radical Evolution” In Joel Garreau’s book “Radical Evolution: The Promise and Peril of Enhancing Our Minds‚ Our Bodies- and What It Means to Be Human” Garreau discusses the concept “singularity” along with views from Vernon Vinge‚ Ray Kurzweil and others. Singularity is this drastic change that will take place during a period of accelerating change in particular with technology. “The Curve implies one of the all-time changes in the rules. Those who study it call it “The Singularity”. (p.67)
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Symbols of Evolution Symbols of Evolution Two billion years ago two prokaryotes bumped into each other and formed the first multi-cellular organism. 65 million years ago an asteroid hit the earth and dinosaurs became extinct. Three days ago‚ in your notebook‚ you drew a mess of squiggles which to you represented Jackson Pollock ’s painting‚ Number 1‚ 1948. You wrote the word entropy on the upper left hand corner of the page. On the bottom right hand side you wrote‚ Creativity is based
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