6 million and 250‚000 years ago. d. Homo erectus is thought to have evolved in Africa from another human ancestor known as Homo habilis--which happens to be the first member of the genus Homo. e. Homo erectus dispersed into Asia more than 1.3 million years ago and then into Europe about 400‚000 years ago. 2. Physical Description (What did they look like?) a. Anatomically and physiologically‚ Homo erectus is similar to modern humans except for a slightly heavier bone
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earlier forms during the history of the earth is defined as Evolution. Many time organisms evolve due to environmental changes. To better understand evolution this paper will review a diagram of an organism and explain how the organism has evolved physiologically to become suited to fit its environment. Organism To understand the evolution of an organism it is important to understand facts about the organism. The diagram illustrated below is a jellyfish. Jellyfish are located in the Artic Sea‚ the
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species with different ecological preferences. An example of ecological isolation occurs within the Rana genus. R. grylio‚ the pig frog and R. areolata‚ the gopher frog both occur around New Orleans‚ Louisiana. The exceptionally aquatic pig frog lives in deep ponds‚ lakes and marshes amongst surfacing vegetation and breeds in deep water so has no contact with the gopher frog which lives in burrows during the day‚ and in the swamp margins at night and breeds in shallow water. This way the possibility
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happened here and there‚ almost completely wiping out all lifeforms‚ yet here we still are. I believe that all life forms are related in some way and that we all started out as singular cell organisms. After years of evolution‚ these single cells evolved into something greater‚ all life forms that we know today. It is because of this common ancestor that has caused most organisms today to be related‚ some closer than others. Typically‚ the original organisms upon this planet split into different
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Definition/comparison questions Evolution / Selection Evolution is a slow continuous process of change that happens in plants and animals over a long period of time resulting in a change from simpler to more complex forms. This is the reason modern day plants and animals are different from those of past. The competition for resources will favour organisms with better adaptability and certain variations over others hence leading to change in the rate of occurrence of certain traits within that population
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discusses a Harvard study‚ which found that the reward center in the brain is more stimulated when talking about oneself as compared to other topics due to evolution. In the beginning of the selection‚ the point of focus is what exactly is going on physiologically that would cause people to enjoy talking about themselves‚ with Frank Rose then indicating that MRI scans displayed increased activity in the mesolimbic dopamine system. Around halfway through‚ however‚ gears shift from the question of what was
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|[pic] |Course Syllabus | | |College of Natural Sciences | | |BIO/101 | |
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Thus‚ every intense emotion has a physiological counterpart in the body -- a "body felt sensation" that corresponds to an emotional feeling -- giving rise to the so-called "mind/body" paradigm. When you are happy‚ sad‚ or calm‚ you are physiologically very different‚ and the related body felt sensation varies accordingly. For our purposes‚ we shall consider that an "emotion" has two parts: 1) vivid imagery that is processed by the limbic system‚ and 2) an accompanying "body felt sensation"
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areas relative to their mass (and all cells are close to the outer surface). See where a circulatory system comes in? Larger animals (amphibians‚ eels) supplements breathing with cutaneous respiration Skins are heavily vascularized Hibernating frogs and turtles can exchange all gases through skin while submerged Presence of gills can vary through animal development All chordates have gill slits at some point Gills: efficient gas exchange in water Many different types of gills external extensions
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delicious meat they then experienced a craving their body had been screaming for all along. This fits right into your instinct. Historically‚ humans have been natural meat eaters. Why do you think meat tastes so good to us? It’s because our species has evolved to eat it. According to National Geographic‚ “We have an improved ability to process cholesterol and fat.” Ninety-eight percent of the world eats meat‚ and it tastes good to most of us because chemicals are released in our brain that tell our body
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