Characteristics of Life Introduction: For many centuries‚ and longer‚ people have argued about the characteristics that separate life from non-life. While some of these arguments are unresolved‚ there are seven characteristics of life that are generally accepted. Anything that possesses all seven of these characteristics of life is known as an organism. 1. The scientific term for a living thing is _____________________________________. Directions: Read each of the following sections
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Communication‚ Homeostasis & Energy Communication & Homeostasis Outline the need for communication systems within multicellular organisms‚ with reference to the need to respond to changes in the internal and external environment and to co-ordinate the activities of different organs. Organisms need to respond to external stimuli‚ e.g. temperature‚ oxygen concentration and levels of sunlight. These may be over time‚ e.g. winter fur to summer fur‚ or quickly‚ e.g. changing size of pupils. Internal
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following questions: a) Find out how the medical community defines “obesity.” What factors contribute to obesity? b) What is “set point theory”? Are toxins involved? Describe how body size and homeostasis are related.
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determines the ability of lungs to take in and release air.) 5. Which term best characterizes the concept of homeostasis? Dynamic Equilibrium (Homeostasis involves adapting responses to the ever-changing environment.) 6. In what direction does a negative feedback mechanism drive the factor being regulate? In the opposite direction (Negative means “opposite” in the context of feedback and homeostasis.) 7. Which of the following is visible when viewing the front of a human body in anatomical position?
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cell theory‚ gene theory‚ evolution‚ homeostasis‚ and laws of thermodynamics. • Cell Theory: all living organisms are composed of cells. The cell is the basic unit of life. • Gene Theory: traits are inherited through gene transmission. Genes are located on chromosomes and consist of DNA. • Evolution: any genetic change in a population that is inherited over several generations. These changes may be small or large‚ noticeable or not so noticeable. • Homeostasis: ability to maintain a constant internal
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Farmers of the Late Nineteenth Century The period between 1880 and 1900 was a boom time for American Politics. The country was finally free of the threat of war‚ and many of its citizens were living comfortably. However‚ as these two decades went by‚ the American farmer found it harder and harder to live comfortably. Crops such as cotton and wheat‚ once the sustenance of the agriculture industry‚ were selling at prices so low that it was nearly impossible for farmers to make a profit off them.
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not abide by it. In October 1992‚ Mr. Taylor launched “Operation Octopus against the city of Monrovia. Civilians‚ once again fled for the lives into NPFL held territory. Rockets were thrown into Monrovia from all directions resulting in the loss of many lives. The peace keeping force of ECOMOG had advantage on the ground‚ sea and air‚ using Gunboats on the seas‚ and Alpha Jet Bombers in the air. Operation Octopus lasted for three months and a ceasefire ensued in the capital of Benin‚
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theories of Biology that attempt to organize and make sense of the multitude of ideas surrounding the major theories of Biology. The theories include evolution of natural selection‚ inheritance‚ cells‚ biological classification‚ bioenergetics‚ homeostasis‚ and ecosystems. The evolution of natural selection is the theory the theory that attempts to explain how and why species are able to adapt to their environments. “The reason that natural selection is important is that it’s the central idea
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sleep‚ rest‚ and nutrition that they need to recovery correctly. Overtraining can lead to injury and can lead to allostasis‚ which is a disrupted balance of the body. The human body always wants homeostasis‚ a balance within the body‚ and when it is not the body will take actions to place it back into homeostasis. Many people do not understand the benefits of a training plan‚ setting realistic goals‚ and sticking to the plan they create. This lack of understanding results in people not creating a training
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used to determine d. Fluid in the lungs 5. This is the sum of all cellular processes that occur in the body. e. Metabolism 6. This is the regulation of body conditions within normal limits. f. Homeostasis 7. The systems that provide homeostasis are: g. Nervous system and Endocrine 8. This body fluid directly affects the proper functioning of cells. h. Interstitial fluid 9. This is the structure of a feedback system that receives output from
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