All living things have evolved into three groups‚ or domains‚ of closely related organisms: Archaea‚ Bacteria‚ and Eukaryota. Archaea and Bacteria are small‚ simple cells surrounded by a membrane and a cell wall‚ with a circular strand of DNA containing their genes. They do not contain a nucleus or other internal structures that higher cells may have. These are called prokaryotes. Basically all the life you see today‚ including plants and animals‚ belongs to the third domain‚ Eukaryota. Eukaryotic
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-Unicellular-one cell -Multicellular-one or more cells -Living things produce offspring *Reproduction is essential for the continuation of the species. -Sexual- two cells from different parents unite -Asexual- a cell splits to form two organisms -Living things grow and develop *Organisms start as a single cell. *Growth results in the increase in the amount of living materials Development - All of the changes that take place during the life of and organism. Like when kids get smarter
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Chapter 1 Reading and Study Guide Why This Chapter Matters 1. We are living in the golden age of biology. Biological discoveries revolutionize medicine‚ change agriculture‚ and impact human culture. 2. Life is united not by a single trait‚ but by a common set of characteristics. Appreciating what it means to be living is as complex as life itself. 3. Life exists at many levels of biological organization. Understanding how these levels interrelate provides insight into the mechanisms of living systems
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Human Biology‚ 7e (Johnson) Chapter 1 Human Biology‚ Science‚ and Society 1.1 Multiple Choice Questions 1) The branch of science that studies living organisms and their life processes is A) biology B) geology C) chemistry D) physics Answer: A Topic: Sec. 1.0 Skill: Knowledge/Comprehension 2) The process by which living organisms maintain a fairly constant internal environment despite changes in the external environment is known as A) metabolism B) biology C) homeostasis D) evolution
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Family | Campylobacteraceae | Genera | Helicobacter | Genus/Species | Helicobacter pylori | Description | Helicobacter pylori is a motile‚ curved‚ spiral‚ or straight‚ slightly plump‚ gram-negative rod. It is believed to be a major cause of gastritis and peptic ulcers although it resides solely on the gastric mucosa and does not enter cells. Microscopic description for the family Campylocbacteraceae | Shape: Spiral ShapedStaining Reaction (Gram): NegativeUnique Characteristic: Spiral
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The organisms first believed to live on Earth were the Prokaryotes. Prokaryotes have many differences and similarities to a Eukaryote. For an example‚ their names sound similar yet they are not the same so that makes them different. Since there are so many organisms‚ the organisms are separated into those two broad categories. Prokaryotes are nearly always a unicellular organisms. An example of a Prokaryote is bacteria and archaea . Prokaryotes do not contain a nucleus or a membrane that should
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processes. The living world comprises an amazing diversity of living organisms. Early man could easily perceive the difference between inanimate matter and living organisms. Early man deified some of the inanimate matter (wind‚ sea‚ fire etc.) and some among the animals and plants. A common feature of all such forms of inanimate and animate objects was the sense of awe or fear that they evoked. The description of living organisms including human beings began much later in human history. Societies
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Bio Notes 9/5/2012 * Biology- Study of living things * Characteristics of living organisms * Consist of one or more cells * Unicellular- one cell able to carry out life ex. Bacteria * Multicellular- Many cells‚ specialized cells * Observations with microscopes lead to Cell Theory‚ Robert Hook * All cells come from preexisting cells * All cells are similar in chemical composition * Chemical reactions occur within
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THE 5 KINGDOMS OF LIFE- the amazing diversity of living systems 1. the Monera The five-kingdom system of classification for living organisms‚ including the prokaryotic Monera and the eukaryotic Protista‚ Fungi‚ Plantae and Animalia is complicated by the discovery of archaebacteria. The prokaryotic Monera include three major divisions: The regular bacteria or eubacteria; the cyanobacteria (also called blue-green algae); and the archaebacteria. Lipids of archaebacterial cell membranes differ considerably
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Honors Biology (modified from Foundation Notes) Unit 1 Early Topics Main Sections * Definition of Biology * Characteristics of Life * Levels of Organization * SI Units and Relative Size * Scientific Method * Classification and Binomial Nomenclature Definition of Biology CHAPTER 1 Biology can be broadly defined as the “study of life” or the “study of living things”. It includes molecules that are made‚ used by‚ or derived from living things. It
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