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The Characteristics of Living Things
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Great Complexity & Cellular Organization Reproduction & Development Responds with the Environment Metabolism Capacity for growth Homeostasis Heredity Evolution (Adaptation)
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Atoms Molecules Organelles Cells Tissues Organs Organ Systems Organisms Populations Communities Ecosystems Biosphere
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Some Elements
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Water (H 2 O) Carbon Dioxide (CO 2 ) Molecular Oxygen (O 2 ) Ammonium (NH 3 ) Sodium Chloride (NaCl) Water (H 2 O) Carbon Dioxide (CO 2 ) Molecular Oxygen (O 2 ) Ammonium (NH 3 ) Sodium Chloride (NaCl) Simple Inorganic Molecules
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Categories: Lipids ProteinsNucleic Acids Carbohydrates Biological Compounds
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Cell Organelles mitochondria smooth ER nucleus golgi rough ER
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Cells Osteocyte Nerve cell Blood cell Muscle cell
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Levels of Body Organization
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carbon atom organ system DNA molecule organellecell tissue organ organismpopulation community ecosystem biosphere
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Prokaryotic Cell
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Eukaryotic Animal Cell
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Eukaryotic Plant Cell
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Classification: Six kingdom system : Eubacteria Protista Fungi Plantae Animalia Archaebacteria E. coliCyanobacteria ParameciumDiatomSlime mold
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Asexual Reproduction Coral polyp budding
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Sexual Reproduction
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Development
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Both Sexual & Asexual
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–Living things interact with each other and with the environment –Ecology – the study of these interactions Hawaiian Monk seals eat fish Humans eat fish What if something happened to the fish? Interaction with the environment
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Interaction with the Environment
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The sum total of the chemical processes that occur in living organisms, resulting in growth, production of energy, elimination of waste material, etc. Anabolism- build up of complex molecules Catabolism- break down of complex molecules Metabolism
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Cellular Respiration C 6 H 12 O 6 + 6O 2 6H 2 O + 6CO 2 + energy
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Photosynthesis 6H 2 O + 6CO 2 + light C 6 H 12 O 6 + 6O 2
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Growth Organisms require a source of food to provide energy for growth
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Autotrophs Organisms that make their own food (like plants, some protists, and some bacteria) Plants capture energy from the sun, use water and carbon dioxide to make sugars and starches Photosynthesis Chemosynthesis
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Heterotrophs Organisms that take in food to meet their energy needs Animals must consume autotrophs (plants), and other heterotrophs to meet their energy needs
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Homeostasis 1.Maintenance of constant internal conditions in varying environments 2.Adaptation of organisms to specific environments
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Homeostasis Three big problems 1.Obtaining energy and nutrients 2.Maintaining temperature 3.Obtaining and holding onto water
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Body Temperature Regulation
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Temperature Control Ectotherms (Poikilotherms) Generate body heat metabolically, but cannot maintain constant internal body temperatureGenerate body heat metabolically, but cannot maintain constant internal body temperature Body temperature mimics the surrounding environmentBody temperature mimics the surrounding environment
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Most ectotherms regulate their body temperature by basking moving between shade/sun being active at certain times of day Ectotherms
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Temperature Control Endotherms (homeothermic) Generate body heat metabolically and body temperature does not match the temperature of the surrounding environmentGenerate body heat metabolically and body temperature does not match the temperature of the surrounding environment These organisms retain metabolic heat and can control metabolism to maintain a constant internal temperatureThese organisms retain metabolic heat and can control metabolism to maintain a constant internal temperature
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Transmission of characteristics from parent to offspring Instructions from parent to offspring are passed on in the form of genes Heredity
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DNA Contains information for almost all cell activities
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Heritable variations Blood type Dwarfism Beak Depth Banding pattern Eye color
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Evolution Change in the genetic composition of a population through time
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Mechanisms Contributing to Evolutionary Change Production of heritable variations Natural Selection Chance Production of heritable variations Natural Selection Chance
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Adaptations The structural, functional, and behavioral features that contribute to the success of a species.
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