IntroBio-01- Intro to Bio, life, scientific method, taxonomy

IntroBio-01- Intro to Bio, life, scientific method,...

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Introduction to Biology 1
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Biology Scientific study of life (natural science) 2
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Characteristics of Life 3
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1. Organization Organisms are composed of cells Uni- or multi-cellular organisms 4
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2. Regulation To coordinate internal functions Homeostasis : maintenance of a balanced internal environment 5
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6
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3. Sensing and responding Sense changes in the environment and make responses to them 7
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4. Growth and development Biological growth : increase in size of cells or in the number of cells or both Development : all the changes that take place during an organism’s life 8
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5. Reproduction Mechanisms by which organisms produce offspring 9
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DNA Hereditary molecule: DNA (deoxyribonucleic acid) Function: contains genetic instructions of the organism 10
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6. Energy utilization Metabolism all chemical reactions of an organism 11
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7. Evolution Genetic change in a population over time 12
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Levels of biological organization 13
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Atom unit of matter Molecule 2 or more atoms joined by a chemical bond 14
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Organelle - subunit of a cell involved in a specific function Cell the smallest unit having the capacity to live and reproduce 15
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Tissue groups of cells similar in structure and function Organ 2 or more tissues forming a single unit that performs a specific function 16
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