as a double helix. Each nucleotide consists of a sugar base .Nucleotides form together creating a sugar phosphate backbone to each strand. There are three forms of DNA that differ significantly. The most common‚ B form‚ is the structure most people have heard of. It consists of the right handed double helix‚ with a large major groove and a smaller but accessible minor groove. These grooves are spaces between the backbones which allow access to the bases for interactions with proteins. A form DNA is
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1. Briefly explain how does the body maintain homeostasis? Homeostasis is a existence and maintenance of a relatively constant internal environment. Homeostasis is maintain by negative and positive feedback mechanism. Most homeostatic control mechanisms are negative feedback mechanisms. In these system‚ the output shut off the original stimulus or reduce its intensity. These mechanisms cause the variable to change in a direction opposite to that of the initial change‚ returning it to its “ideal”
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If you were a male would you rather have a beautiful‚ impressive‚ long tail that attracts a lot of women or would you rather have a shorter‚ less attractive tail that enables you to escape from predators more easily? Living out in the wild among many potential predators‚ a shorter tail would seem more logical since it would be a more useful trait than a good-looking one. Though the most logical choice‚ it is not always the case. In many species‚ traits that would normally be considered awkward
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SCI/230 Food Web Diagram Food Web Diagram: The Everglades By: Ashley Earp Due: Sunday May 12 Class: SCI/230 Instructor: Ethel Garcia SCI/230 Food Web Diagram Food Web Diagram of the Everglades. |-------------------------------- Alligators/Anaconda/Pythons(C)--------------------------------| /
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Everglades Ecosystem Amber Rouse SCI/230 July 17‚ 2011 Everglades Ecosystem The Everglades National Park is located in southern Florida. The park is 1‚506‚539 acres‚ with a diverse set of animals calling this popular park home. According to Park Vision the Everglades National park is one of the largest national parks in the United States. The Everglades National park has only two larger than it within the United States. Over one million tourists plan this unique place as a recreational trip
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statement about evolution is FALSE? 1. Natural selection is about slow but steady progress. Through it‚ populations constantly get better-adapted. When this process is completed for all populations‚ evolution will come to a stop. 2. According to evolutionary theory‚ you are related to a bacterium‚ to a yeast cell‚ to a snake‚ and to a whale. In fact‚ you are related to every species now alive on Earth‚ and to fossil species like dinosaurs as well. 3. Natural selection acts on genetic differences within
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the pyrimidines there are Cytosine (C) and Thymine (T). The base pairs are Adenine and Thymine (A-T) and Cytosine and Guanine (C-G). DNA is found in the nucleus of every human cell. Humans have 46 chromosomes. When a cell reproduces‚ the chromosomes get copied and distributed to each offspring. 2. How does an organism’s genotype determine its phenotype? The genes are transcribed to produce mRNA. The mRNA is translated to produce proteins. The proteins are more often than not enzymes
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Natural Selection Paper Natural selection is considered one of the most important processes for a variety of species and the environment which allows the fittest organisms to produce offspring. To prevent a species from extinction‚ it is necessary for them to adapt to the surrounding environment. The species which have the ability to adapt to new surroundings will be able to pass their genes through reproduction. Within the process of natural selection‚ it is possible for the original genetic make-up
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PHYSICAL ABILITY Physical ability is the capacity to do tasks or perform any work that requires stamina‚ dexterity‚ strength‚ and similar characteristics. There are nine basic physical abilities that one should have. They are as follows: ▪ Strength Factors: • Dynamic strength • Trunk strength • Static strength • Explosive strength ▪ Flexibility Factors: • Extent flexibility • Dynamic flexibility
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Valesia Johnson SCI/230 March 30‚ 2014 Linda Armstrong Individual Evolution Assignment Resource: “The Origin of Species” section in Ch. 14 of Campbell Essential Biology With Physiology You must number your answers. Think about early prehistoric times for humans - a primitive society not an industrialized society. 1. How might natural selection have influenced human choices and behaviors in a prehistoric society? Answer in paragraph form. Natural selection may have been influential
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