BIOL 1543 1st Edition Lecture 1 Outline of Current Lecture I Levels of organization II Living things and their environments III Cells are fundamental units of life IV All forms of life have common features V Evolution explains the unity and diversity of life a Natural selection VI Hypothesis based science poses and tests hypotheses a Falsifiable b Theories VII Biology is all around us everyday Current Lecture I Levels of organization a Life s structural hierarchy defines the scope of biology the scientific study of life b 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 terms These 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 components ii Community All the living organisms in an ecosystem iii Population consists of a localized group of individuals of one species iv Organism An individual living entity II Living things and their environments a Energy flows one way through an ecosystem i 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 out III Cells are fundamental units of life a Eukaryotic cells contain membrane enclosed organelles including a DNAcontaining nucleus i All cells that have a true nucleus are eukaryotic b Prokaryotic cells lack such organelles
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