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U of A BIOL 1543 - Introductory Concepts
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Outline of Current LectureCurrent LectureII. Living things and their environmentsIII. Cells are fundamental units of lifeBIOL 1543 1st EditionLecture 1Outline of Current LectureI. Levels of organizationII. Living things and their environmentsIII. Cells are fundamental units of lifeIV. All forms of life have common featuresV. Evolution explains the unity and diversity of lifea. Natural selectionVI. Hypothesis-based science poses and tests hypothesesa. Falsifiableb. TheoriesVII. Biology is all around us everydayCurrent LectureI. Levels of organizationa. Life’s structural hierarchy defines the scope of biology, the scientific study of lifeb. Levels (in order with examples)i. Biosphere (everything in Earth), ecosystem (Florida coast), Community(all organisms on the Florida coast), Population (groups of brown pelicans), Organism (brown pelican), Organ system (nervous system), Organ (brain), Tissue (nervous tissue), Cell (nerve cell), Organelle (nucleus), Molecule (DNA), Atoms.c. Must know termsThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.i. Ecosystem: consists of all the organisms living in a particular area and the nonliving environmental componentsii. Community: All the living organisms in an ecosystemiii. Population: consists of a localized group of individuals of one speciesiv. Organism: An individual living entityII. Living things and their environmentsa. Energy flows one way through an ecosystemi. Sunlight -> photosynthesis -> cycling of chemical nutrients as chemical energy -> cellular respiration (ATP) -> Heat from animal or the decomposition of the animal.b. All ecosystems are closed except for solar energy in and heat outIII. Cells are fundamental units of lifea. Eukaryotic cells contain membrane-enclosed organelles, including a DNA-containing nucleus.i. All cells that have a true nucleus are eukaryoticb. Prokaryotic cells lack such


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